When it comes to the Mayo Clinic Diet, the name behind the diet belongs to one of the most respected medical organizations in the world, so it's no surprise the diet is popular.
Confidence votes 680. As of September 30th, 2011, there are roughly 2,889,000 WWII veterans alive in the USA according to the U.S. Department of Veteran Affairs. Worldwide, there are about 5,250,000 still around as of late 2011.
This VA report, 4L_VetPop, estimates there are about 21,368,156 total vets as of 2016. Of those, there are about 2,565,741 total U.S. Marine veterans. So, the total number of potential living U.S. Marines in the world is about 2,787,693. Census.gov reports about 323,450,000 estimated population of U.S., and if we calculate the percentage of the population that are U.S. Marines Active/Reserve/Veteran, which was 2,565,741, we get the following: .862%.