The most interesting number is the 1300 submissions because that hasn't grown since 2011 - it just fluctuates. Everything else has been growing more or less linearly for a long time, which is how we like it.
I find that surprising, as 2011-2022 covers an exponential rise in SEO spam and "growth hackers" attempting to drive traffic and links.
Or was 1,300 the number of non-flagged submissions?