Is toxicity decreasing?

I feel like this is a pretty key question. Riot has been changing reports/reform, overhauling tribunal, increasing bans and punishments, but is toxicity actually decreasing?

Sure, we can have everyone give their limited experiences, but that doesn't tell us anything. Riot needs to post some stats on whether less people are actually being toxic.

I think a good way to determine this is to track average reports/game. Sure, every report doesnt mean that someone was actually doing wrong, but it means that players were unhappy with each other and did not enjoy the game as much as they should have. Ultimately the goal should be to make everyone enjoy the game as much as possible, So tracking amount of reports seems like a good way to tell.

Even if that's not a good indicator, can we get some info on whether all this effort has actually reduced toxicity?