Year	per 1,000 female adults
1960	149.04
1961	142.242
1962	137.378
1963	128.707
1964	123.801
1965	120.832
1966	115.166
1967	110.882
1968	108.452
1969	106.11
1970	104.154
1971	97.101
1972	94.077
1973	91.332
1974	87.453
1975	84.221
1976	79.972
1977	75.647
1978	73.2
1979	70.708
1980	69.07
1981	66.58
1982	64.597
1983	63.577
1984	61.791
1985	60.38
1986	58.438
1987	56.666
1988	56.06
1989	54.948
1990	53.481
1991	53.069
1992	52.54
1993	51.547
1994	50.013
1995	51.736
1996	49.269
1997	48.744
1998	49.129
1999	48.95
2000	47.678
2001	46.442
2002	45.427
2003	44.965
2004	45.393
2005	45.07
2006	44.117
2007	43.235
2008	42.722
2009	41.645
2010	41.443
2011	45.256
2012	39.817
2013	39.211
2014	38.752
2015	37.142
2016	36.993
2017	35.699
2018	35.783
2019	35.483
2020	35.611
2021	35.66