NPR – Ina Jaffe
“While the prevalence of dementia cases dropped, the average amount of education in the study population increased. In 2000, the average amount of education was 11.8 years, just shy of the 12 years it usually takes to graduate from high school. In 2012, the average amount of education was 12.7 years — in other words, high school plus a little bit of college.”(more)