Year	per 1,000 female adults
1960	104.51
1961	104.839
1962	109.123
1963	104.974
1964	97.26
1965	99.011
1966	96.901
1967	100.424
1968	96.192
1969	98.185
1970	101.532
1971	98.006
1972	100.313
1973	99.886
1974	98.295
1975	102.077
1976	103.145
1977	103.427
1978	106.936
1979	106.095
1980	109.577
1981	107.347
1982	107.551
1983	108.219
1984	112.708
1985	109.451
1986	97.996
1987	99.568
1988	98.918
1989	101.846
1990	107.204
1991	110
1992	115.421
1993	125.075
1994	125.783
1995	131.093
1996	128.347
1997	130.648
1998	130.858
1999	134.812
2000	125.338
2001	130.326
2002	137.368
2003	130.887
2004	128.963
2005	127.967
2006	122.46
2007	115.608
2008	111.707
2009	113.28
2010	112.143
2011	114.383
2012	97.548
2013	95.272
2014	89.986
2015	82.36
2016	82.559
2017	77.933
2018	79.839