If those figures are for the past year (2018), total reports of top reporters likely significantly higher at the moment, because with spam waves from Your; ban wave from plagiabot; I do believe reporters do make more reports recent months.
Lets just say I know for a fact that someone else has higher reporting statistics than me at 39k, although I stopped reporting once I was made a moderator back last year apart from the odd one out of my jurisdiction. Apparently I've now been left in their dust
.My guesstimate would be that there are more than 5 users with 15k+ reports now. Although, I think the leader of reports is quite a bit ahead of everyone else, and if they're not then I'll be impressed as the figures I was hearing are absolutely insane!
I'm not too concerned about bad reports, and I'm actually surprised there aren't more of them, but I have reported a lot of wrong language, wrong section, and obvious spam posts. The low-value posts are always a crapshoot as to whether a moderator is going to agree with you or not.
I have 263 bad reports, and now that the new system out where bad reports are actually shown you'll be able to guess why, and hopefully improve upon that. Honestly, bad reports aren't that big of a deal.