How many leap days since 1948?

Up to 2015, there have been 16 leap days since 1948. They were in the years 1952, 1956, 1960, 1964, 1968, 1972, 1976, 1980, 1984, 1988, 1992, 1996, 2000, 2004, 2008 and 2012.