1972, 1976, 1980, 1984, 1988, 1992, 1996, 2000, 2004 and 2008.
There were 10 leap years between 1970 and 2011.
There were. 1972 and 1976 were intercalary years (leap years), as was 1980. Such years are sometimes called bissextile years.
1972 was the only leap year between 1969 and 1975.
That is correct. The leap years from 1950 to 1970 were:196019641968
Just three:200020042008
3 years, as 2012 was the next leap year after 2009.
There were two leap years from 1999 to 2009: 2000 and 2004. Leap years occur every four years to account for the extra 0.25 days in a solar year.
There were 15 leap years in that period:195219561960196419681972197619801984198819921996200020042008
There were 12 leap years between 1958 and 2006, as follows:196019641968197219761980198419881992199620002004There were 12 leap years between 1958 and 2006, as follows:196019641968197219761980198419881992199620002004There were 12 leap years between 1958 and 2006, as follows:196019641968197219761980198419881992199620002004There were 12 leap years between 1958 and 2006, as follows:196019641968197219761980198419881992199620002004There were 12 leap years between 1958 and 2006, as follows:196019641968197219761980198419881992199620002004There were 12 leap years between 1958 and 2006, as follows:196019641968197219761980198419881992199620002004There were 12 leap years between 1958 and 2006, as follows:196019641968197219761980198419881992199620002004There were 12 leap years between 1958 and 2006, as follows:196019641968197219761980198419881992199620002004There were 12 leap years between 1958 and 2006, as follows:196019641968197219761980198419881992199620002004There were 12 leap years between 1958 and 2006, as follows:196019641968197219761980198419881992199620002004There were 12 leap years between 1958 and 2006, as follows:196019641968197219761980198419881992199620002004
Disregarding the leap years, 17598840 hours Regarding leap years, about 17610888 hours
Between 2002 and 2011 the leap years were 2004 and 2008.
24 leap years