See this graph: http://www.smashcompany.com/wp-content/uploads/2017/12/Screen-Shot-2017-12-26-at-11.30.08-AM.png http://www.smashcompany.com/wp-content/uploads

See this graph: http://www.smashcompany.com/wp-content/uploads/2017/12/Screen-Shot-2017-12-26-at-11.30.08-AM.png http://www.smashcompany.com/wp-content/uploads/2017/12/Scree... A few other graphs I collected on my weblog are here: http://www.smashcompany.com/business/is-it-useful-to-have-a-college-degree http://www.smashcompany.com/business/is-it-useful-to-have-a-... http://www.smashcompany.com/philosophy/do-men-become-warlike-if-they-do-not-have-women http://www.smashcompany.com/philosophy/do-men-become-warlike... http://www.smashcompany.com/philosophy/marriage-peaked-in-1958 http://www.smashcompany.com/philosophy/marriage-peaked-in-19...