Year	per 1,000 live births
1977	36.4
1978	35.8
1979	35.2
1980	34.7
1981	34.2
1982	33.8
1983	33.3
1984	33
1985	32.7
1986	32.4
1987	32.1
1988	31.9
1989	31.7
1990	31.4
1991	31.2
1992	30.9
1993	30.6
1994	30.2
1995	29.8
1996	29.4
1997	29
1998	28.7
1999	28.4
2000	28.1
2001	27.8
2002	27.4
2003	27
2004	26.7
2005	26.3
2006	26
2007	25.6
2008	25.2
2009	24.8
2010	24.3
2011	23.8
2012	23.3
2013	22.8
2014	22.3
2015	21.8
2016	21.3
2017	20.8
2018	20.3
2019	19.9
2020	19.5
2021	19
2022	18.3