Recent data leave little doubt that grades are rising at American colleges, universities and high schools. An evaluation of grading practices in US colleges and universities written in 2003, shows that since the 1960s, grades in the US have risen at a rate of 0.15 per decade on a 4.0 scale. The study included over 80 institutions with a combined enrollment of over 1,000,000 students. An annual national survey of college freshmen indicates that students are studying less in high school, yet an increasing number report high school grades of A− or better. Studies are being made in order to figure out who is more likely to inflate grades, and why an instructor would inflate a grade.