Year	per 1,000 female adults
1960	118.001
1961	113.02
1962	113.132
1963	112.71
1964	108.82
1965	109.516
1966	108.337
1967	108.785
1968	105.062
1969	110.714
1970	107.646
1971	103.957
1972	101.486
1973	101.027
1974	100.141
1975	99.771
1976	98.31
1977	97.242
1978	93.176
1979	91.773
1980	91.566
1981	89.63
1982	89.941
1983	90.63
1984	83.994
1985	82.717
1986	80.425
1987	76.681
1988	73.153
1989	73.365
1990	74.578
1991	73.139
1992	71.612
1993	72.481
1994	70.497
1995	67.848
1996	67.426
1997	61.964
1998	62.274
1999	63.636
2000	63.196
2001	60.139
2002	58.829
2003	59.49
2004	55.035
2005	55.201
2006	51.442
2007	51.858
2008	50.262
2009	50.079
2010	48.689
2011	49.353
2012	46.708
2013	45.326
2014	46.009
2015	44.687
2016	43.796
2017	41.779
2018	43.991
2019	40.952