How many leap years have occurred since 1934?

Between 1933 and 2015, there have been 20 leap years. They were 1936, 1940, 1944, 1948, 1952, 1956, 1960, 1964, 1968, 1972, 1976, 1980, 1984, 1988, 1992, 1996, 2000, 2004, 2008 and 2012. The next will be in 2016.