Year	per 1,000 female adults
1960	112.225
1961	108.838
1962	107.874
1963	104.567
1964	105.788
1965	105.897
1966	103.857
1967	103.912
1968	107.248
1969	110.211
1970	111.705
1971	109.232
1972	106.788
1973	105.413
1974	105.837
1975	102.028
1976	100.425
1977	101.402
1978	102.586
1979	102.914
1980	103.491
1981	101.341
1982	99.342
1983	101.205
1984	99.723
1985	97.089
1986	99.324
1987	95.941
1988	94.815
1989	95.581
1990	95.017
1991	94.837
1992	91.241
1993	87.543
1994	84.664
1995	87.578
1996	80.073
1997	81.553
1998	76.781
1999	75.214
2000	76.137
2001	75.735
2002	72.549
2003	74.23
2004	68.716
2005	69.669
2006	66.353
2007	64.729
2008	65.342
2009	62.774
2010	60.281
2011	59.481
2012	58.347
2013	56.75
2014	53.443
2015	53.074
2016	53.474
2017	51.586
2018	51.152
2019	51.96
2020	54.973
2021	61.338