All that aside, we've been keeping up with the schedule throughout the year over at the Elwood City Central forum, and after going over what's been aired this past year, it only confirms everybody's suspicion that older episodes and good episodes are aired considerably less than bad episodes.
Good episodes are presented in green, bad episodes in red, and Season 16 and 17 are yellow since they're more subjective.
Also, there are a number of dates that I wasn't able to record information for, so the fact that nothing was mentioned for those specific dates indicates that bad episodes were aired those days.
1/01: N/A
1/02: N/A
1/03: N/A
1/04: N/A
1/07: N/A
1/08: N/A
1/09: N/A
1/10: N/A
1/11: N/A
1/14: N/A
1/15: N/A
1/16: N/A
1/17: N/A
1/18: N/A
1/21: N/A
1/22: N/A
1/23: N/A
1/24: N/A
1/25: N/A
1/28: N/A
1/29: N/A
1/30: N/A
1/31: N/A
2/01: N/A
2/04: N/A
2/05: N/A
2/06: N/A
2/07: N/A
2/08: N/A
2/11: N/A
2/12: N/A
2/13: N/A
2/14: “Flea to Be You and Me / Kiss and Tell”
2/15: N/A
2/18: N/A
2/19: N/A
2/20: N/A
2/21: N/A
2/22: N/A
2/25: N/A
2/26: N/A
2/27: N/A
2/28: N/A
3/01: N/A
3/04: N/A
3/05: N/A
3/06: N/A
3/07: N/A
3/08: N/A
3/11: N/A
3/12: N/A
3/13: N/A
3/14: N/A
3/15: N/A
3/18: N/A
3/19: N/A
3/20: N/A
3/21: N/A
3/22: N/A
3/25: N/A
3/26: N/A
3/27: N/A
3/28: N/A
3/29: N/A
4/01: N/A
4/02: N/A
4/03: “Francine’s Split Decision / Muffy Goes Metropolitan”
4/04: N/A
4/05: N/A
4/08: “Ants in Arthur’s Pants / Don’t Ask Muffy”
4/09: “Muffy’s Classy Classics / Best Enemies”
4/10: N/A
4/11: N/A
4/12: “Elwood City Turns 100!”
4/15: “To Tibble the Truth / Waiting to Go”
4/16: “D.W.’s Time Trouble / Buster’s Amish Mismatch”
4/17: N/A
4/18: “Pick a Car, Any Car / Jenna’s Bedtime Blues”
4/19: “The World of Tomorrow / Is There a Doctor in the House?”
4/22: "D.W. Thinks Big / Arthur Cleans Up"
4/23: "Dear Adil / Bitzi's Break-Up"
4/24: "The Wheel Deal / The Buster Report"
4/25: "Fernfern and the Secret of Moose Mountain / Thanks a Lot, Binky"
4/26: "The Agent of Change / D.W. Unties the Knot"
4/29: "All About D.W. / Blockheads"
4/30: "Nicked by a Name / The Play's the Thing"
5/01: "Get Smart / Baby Steps"
5/02: "Falafelosophy / The Great Lint Rush"
5/03: "Night of the Tibble / Read and Flumberghast"
05/13: "Fernkenstein's Monster / D.W. Dancing Queen"
05/14: "Vomitrocious / Sue Ellen Chickens Out"
05/15: "Is That Kosher? / Never Never Never"
05/16: "Desk Wars / Desperately Seeking Stanley"
05/17: "Muffy's Art Attack / Tales From the Crib"
05/20: "Flea to Be You and Me / Kiss and Tell"
05/21: "The Last Tough Customer / Brain's Chess Mess"
05/22: "Big Horns George / Bleep"
05/23: "Baseball Blues / Brain's Biggest Blunder"
05/24: "Tales of Grotesquely Grim Bunny / Pet Projects"
05/27: "Buster's Book Battle / On the Buster Scale" (16)
05/28: "Follow the Bouncing Ball / Buster Baxter and the Letter From the Sea" (14)
05/29: "Fern and the Case of the Stolen Story / Sue Ellen Vegges Out" (16)
05/30: "Around the World in 11 Minutes / Muffy and the Big Bad Blog" (14)
05/31: "Arthur Unravels / All the Rage" (14)
06/03: "The Curse of the Grebes / Arthur Changes Gears" (10)
06/04: "Castles in the Sky / Tipping the Scales" (9)
06/05: "The A Team / Emily Swallows a Horse" (9)
06/06: "Francine's Big Top Trouble / George Blows His Top" (9)
06/07: "Arthur Weighs In / The Law of the Jungle Gym" (9)
6/10: "Buster's Green Thumb / My Fair Tommy" (9)
6/11: "Lights, Camera, Opera! / All Worked Up" (9)
6/12: "Arthur Makes Waves / It Came From Beyond" (9)
6/13: "Fifteen" (15)
6/14: "Three's a Crowd / A is for Angry" (9)
6/17: "D.W. Beats All / Buster the Myth Maker" (9)
6/18: "I Wanna Hold Your Hand / Whistling in the Wind" (15)
6/19: "Binky Goes Nuts / Breezy Listening Blues" (9)
6/20: "Buster's Secret Admirer / The Last King of Lambland" (15)
6/21: "Cents-less / Buster the Lounge Lizard" (15)
6/24: "To Eat or Not to Eat / S.W.E.A.T." (15)
6/25: "Happy Anniversary" (10)
6/26: "The Squirrels / Fern and Persimmony Glitchet" (10)
6/27: "Grandpa Dave's Memory Album / Buster's Carpool Catastrophe" (15)
6/28: "Desert Island Dish / The Secret About Secrets" (10)
7/01: "Prunella the Packrat / What's in a Name?" (15)
7/02: "Feeling Flush / Family Fortune" (10)
7/03: "D.W. Aims High / Flaw and Order" (10)
7/04: "Buster's Garden of Grief / Through the Looking Glasses" (15)
7/05: "The Butler Did...What? / The Trouble With Trophies" (15)
7/08: "What's Cooking? / Buster's Special Delivery" (10)
7/09: "Unfinished / D.W., Bossy Boots" (10)
7/10: "Do You Speak George? / World Girls" (10)
7/11: "Based on a True Story" (16)
7/12: "All About D.W. / Blockheads" (16)
7/15: "Swept Away / Germophobia" (11)
7/16: "Flippity Francine / Muffy Takes the Wheel" (16)
7/17: "Get Smart / Baby Steps" (16)
7/18: "Arthur Sells Out / Mind Your Manners" (11)
7/19: "Night of the Tibble / Read and Flumberghast" (16)
7/22: "Buenas Noches, Vicita / Prunella Packs It In" (11-3)
7/23: "The Last Tough Customer / Brain's Chess Mess" (16-6)
7/24: "Phony Fern / Brain's Shocking Secret" (11-4)
7/25: "Baby Kate and the Imaginary Mystery / Strangers on a Train" (11-5)
7/26: "Buster's Book Battle / On the Buster Scale" (16-8)
7/29: "Baseball Blues / Brain's Biggest Blunder" (16-7)
7/30: "The 'A' Team / Emily Swallows a Horse" (9-8)
7/31: "The Curse of the Grebes / Arthur Changes Gears" (10-6)
8/01: "When Carl Met George / D.W. Swims With the Fishes" (13-6)
8/02: "The Wheel Deal / The Buster Report" (14-1)
8/05: "The Making of Arthur / Dancing Fools" (11-6)
8/06: "Is That Kosher? / Never, Never, Never" (12-1)
8/07: "Francine's Pilfered Paper / Buster Gets Real" (11-8)
8/08: "Fern and the Case of the Stolen Story / Sue Ellen Vegges Out" (16-9)
8/09: "Big Brother Binky" (11-10)
8/12: "D.W.'s Stray Netkitten / Bats in the Belfry" (12-3)
8/13: "So Funny I Forgot to Laugh / The Best Day Ever" (16-10)
8/14: "For the Birds / Ungifted" (12-4)
8/15: "The Chronicles of Buster / On This Spot" (12-5)
8/16: "The Cherry Tree / Matchmaker, Matchbreaker (12-6)
08/19: "War of the Worms / I Owe You One" (12-7)
08/20: "The Blackout / Mei Lin Takes a Stand" (12-8)
08/21: "Home Sweet Home / Do You Believe in Magic?" (12-9)
08/22: "The Perfect Game / D.W.'s Furry Freakout" (12-10)
08/23: "Arthur and the Big Riddle / Double Dare" (5-1)
08/26: "The Silent Treatment / Kung Fool" (13-2)
08/27: "Kids Are From Earth, Parents Are From Pluto / Nerves of Steal" (5-2)
08/28: "Arthur's Number Nightmare / Brain Gets Hooked" (13-3)
08/29: "It's a No-Brainer / The Shore Thing" (5-3)
08/30: "MacFrensky / The Good, the Bad, and the Binky" (13-4)
9/02: "The World Record / The Cave" (5.4)
9/03: "No Acting, Please / Prunella and the Disappointing Ending" (13.1)
9/04: "The Lousy Week / You Are Arthur" (5.5)
9/05: "When Carl Met George / D.W. Swims with the Fishes" (13.6)
9/06: "The Portrait of the Artist as a Young Tibble / The Secret Guardians" (13.7)
9/09: "The Election / Francine Goes to War" (5.6)
9/10: "Fernlets by Fern / Prunella and the Haunted Locker" (13.8)
9/11: "Paradise Lost / The Pride of Lakewood" (13.9)
9/12: "Sleep No More / Pet Peeved" (5.7)
9/13: "Looking for Bonnie / The Secret Origin of Supernova" (13.10)
9/16: N/A
9/17: N/A
9/18: N/A
9/19: N/A
9/20: N/A
9/23: N/A
9/24: N/A
9/25: N/A
9/26: N/A
9/27: N/A
9/30: N/A
10/01: N/A
10/02: N/A
10/03: N/A
10/04: N/A
10/07: N/A
10/08: N/A
10/09: N/A
10/10: N/A
10/11: N/A
10/14: N/A
10/15: N/A
10/16: N/A
10/17: N/A
10/18: N/A
10/21: N/A
10/22: N/A
10/23: N/A
10/24: N/A
10/25: N/A
10/28: Prempted
10/30: Prempted
10/31: “Hic or Treatment / Mr. Always Right” (11.7)
11/01: “Muffy’s Classy Classics / Best Enemies” (15.8)
11/04: “Buster’s Garden of Grief / Through the Looking Glass” (15.9)
11/05: “Cast Away / The Great Sock Mystery” (7.1)
11/06: “The Butler Did… What? / The Trouble with Trophies” (15.10)
11/07: “Francine’s Split Decision / Muffy Goes Metropolitan” (7.2)
11/08: “Ants in Arthur’s Pants / Don’t Ask Muffy” (7.3)
11/11: “Show Off / Dog’s Best Friend” (17.1)
11/12: “Adventures in Budylon / Ladonna Compson: Party Animal” (17.2)
11/13: “Molina’s Mulligan / Buster Bombs” (17.3)
11/14: “Opposites Distract / Just the Ticket” (17.4)
11/15: “All Thumbs / Kidonia” (17.5)
11/18: “To Tibble the Truth / Waiting to Go” (7.4)
11/19: “Elwood City Turns 100!” (7.5)
11/20: “The Boy Who Cried Comet / Arthur and Los Vecinos” (6.5)
11/21: “Pick a Car, Any Car / Jenna’s Bedtime Blues” (7.6)
11/22: “Based on a True Story” (16.1)
11/25: “D.W.’s Time Trouble / Buster’s Amish Mismatch” (7.7)
11/26: “Flippity Francine / Muffy Takes the Wheel” (16.2)
11/27: “The World of Tomorrow / Is There a Doctor in the House?” (7.8)
11/28: “Prunella Sees the Light / Return of the Snowball” (7.9)
11/29: “All About D.W. / Blockheads” (16.3)
12/02: “Dear Adil / Bitzi’s Breakup” (8.1)
12/03: “Get Smart / Baby Steps” (16.4)
12/04: “Night of the Tibble / Read and Flumberghast” (16.5)
12/05: “Fernfern and the Secret of Moose Mountain / Thanks a Lot, Binky!” (8.2)
12/06: “The Last Tough Customer / Brain’s Chess Mess” (16.6)
12/09: “Vomitrocious! / Sue Ellen Chickens Out” (8.5)
12/10: Prempted
12/11: “Buster’s Book Battle / On the Buster Scale” (16.7)
12/12: “Fern the Case of the Stolen Story / Sue Ellen Vegges Out” (16.9)
12/13: “So Funny I Forgot to Laugh / The Best Day Ever” (16.10)
12/16: “Desk Wars / Desperately Seeking Stanley” (8.7)
12/17: Prempted
12/18: “Muffy’s Art Attack / Tales from the Crib” (8.8)
12/19: “Big Horns George / Bleep” (8.10)
12/20: Prempted
12/23: “Arthur’s Snow Biz / Bugged” (8.3)
12/24: “Castle in the Skies / Tipping the Scale” (9.1)
12/25: Prempted
12/26: Prempted
12/27: Prempted
12/30: “Arthur’s First Sleepover / Arthur’s New Year’s Eve” (1.30)
12/31: “Arthur’s First Sleepover / Arthur’s New Year’s Eve” (1.30)
So this year, the amount of episodes that are considered good and watchable were only aired about a third or the entire year, while the rest of the year played poorer episodes.
Also, notice that this past year, we only got TWO episodes from the first season, while absolutely nothin from Seasons Two through Four was shown.