28% rate of afk teammates, 35% rate this week
Edit: I should have said "28% of dc'd/afk teammates" as I accidentally lumped the two together
Also to mention, this entire article will exclude all remake games due to afks/DC's at the beginning of the game.
I've been playing this game for 7 years, ever since season 1... and I can say without a doubt... I have one of the worst luck when it comes to having AFK/DC'd teammates on my team. I literally compiled a list, last season, of 250 games and made notes on which one had afk/DC's on my team, vs afk/DC's on enemy team.
The rate came to 28%, which i know 250 games isn't a large enough sample size, but can tell from experience that the previous years were similar. Enemies had "noticeable" afk/dc rates of 11%.
In season 1, I would estimate the rate to be around 15%, where most of them were just rage quitters anyway. It then got progressively worse over the seasons. I made a post last season about this issue... and I'm making it again here.
There needs to be a hidden statistic among each player, that factors into the team selection of solo queue. Even out the afk/dc rates to each side, and it'll be more balanced in the long run.