MikeMirzayanov in this blog asked a question about fighting against meaningless blogs, so I am in hurry to post this picture before rules become strict :-)
.
Line chart shows distribution of handle length by year of registration. Dashboard is created using Tableau. Guys, I love it, Tableau is great! It is possible to look at more details when you hover charts on dashboard directly. Dashboard is based on data downloaded by python script using Codeforces API.