Max by year, since it's hard to see: https://imgur.com/a/YTiDmbc https://imgur.com/a/YTiDmbc edit: no idea why imgur thinks my plot is erotic. But, if anyone

Max by year, since it's hard to see: https://imgur.com/a/YTiDmbc https://imgur.com/a/YTiDmbc edit: no idea why imgur thinks my plot is erotic. But, if anyone is too afraid to click, it's a linear looking increase, up to the right, from 20 to 21C.