Year	per 1,000 female adults
1960	113.682
1961	109.335
1962	111.637
1963	109.065
1964	104.08
1965	100.454
1966	99.058
1967	98.012
1968	95.718
1969	100.624
1970	92.227
1971	95.24
1972	88.797
1973	88.875
1974	85.591
1975	83.456
1976	81.737
1977	76.821
1978	75.151
1979	72.751
1980	69.034
1981	66.509
1982	63.835
1983	64.545
1984	61.98
1985	61.22
1986	61.44
1987	61.99
1988	61.574
1989	60.076
1990	59.548
1991	59.367
1992	57.036
1993	56.131
1994	55.474
1995	54.575
1996	53.898
1997	50.421
1998	48.787
1999	48.721
2000	47.685
2001	47.367
2002	46.403
2003	47.562
2004	45.381
2005	44.35
2006	43.231
2007	43.05
2008	43.44
2009	42.183
2010	40.911
2011	41.086
2012	39.442
2013	39.371
2014	38.519
2015	38.837
2016	37.557
2017	37.653
2018	36.721
2019	35.754
2020	38.335
2021	36.57