Causal claims are always problematic. Anyway, here is a fun graph: http://spreadsheets.google.com/oimg?key=0AhogCtHYB-75dFJMcllqYVdMbEEwR0VUdUhCMWNhQUE&oid=1&

Causal claims are always problematic. Anyway, here is a fun graph: http://spreadsheets.google.com/oimg?key=0AhogCtHYB-75dFJMcllqYVdMbEEwR0VUdUhCMWNhQUE&oid=1&zx=eh4kv54elemo http://spreadsheets.google.com/oimg?key=0AhogCtHYB-75dFJMcll... Source data from http://taxfoundation.org/news/show/250.html http://taxfoundation.org/news/show/250.html