Entering the Twenties on a high note

Philosophical questions about year 0 and 1 aside, I conveniently consider 2020 the start of the 3rd decade in the 21st century. After a successful autumn 2009 I became no 1 on the FIDE classical chess rating list for the first time 10 years ago (January 2010 list), and has held on to this position after two short stints as no 2 in 2010/11.