1989 (10 years since 2000, so minus 11 years from 2000 to get the answer)
2010 minus 1994 = 16
2010 minus 1939 is 71.
2010 minus 1981 is 29.
2012 - 1989 = 23.
2017 - 1989 = 28
2010 minus 1895 equals 115(2010-1895=115)
2010 minus 1993 equals 17.
20
9
-7990 (minus 7990)
2010 - 1996 = 14