Year	per 1,000 female adults
1960	109.671
1961	106.471
1962	108.087
1963	106.692
1964	104.377
1965	105.284
1966	104.174
1967	103.892
1968	103.251
1969	103.714
1970	102.565
1971	98.61
1972	100.848
1973	100.432
1974	97.852
1975	96.673
1976	91.669
1977	92.53
1978	88.565
1979	89.153
1980	86.248
1981	84.326
1982	82.064
1983	78.562
1984	76.412
1985	77.346
1986	75.365
1987	74.392
1988	72.201
1989	71.749
1990	69.678
1991	69.012
1992	68.42
1993	67.366
1994	67.584
1995	66.92
1996	66.074
1997	63.241
1998	62.681
1999	61.623
2000	61.046
2001	59.364
2002	59.492
2003	58.315
2004	57.049
2005	57.113
2006	55.878
2007	55.476
2008	55.899
2009	54.782
2010	52.66
2011	52.671
2012	52.44
2013	50.975
2014	51.4
2015	50.736
2016	51.593
2017	51.511
2018	51.046
2019	49.767
2020	53.873
2021	55.32