Year	per 1,000 people
1960	2.14697933197021
1970	2.18050003051758
1975	2.03660011291504
1980	2.02629995346069
1981	2.07220005989075
1986	2.08570003509521
1988	2.12470006942749
1989	2.01990008354187
1990	2.0708999634
1991	2.0241999626
1992	2.0004000664
1993	1.9292999506
1996	2.0999999046
1997	2.0999999046
2000	2.1
2001	2.1
2002	2.1
2003	2.17
2004	2.17
2005	2.2
2006	2.2
2007	2.1
2008	2.08
2009	1.73
2010	1.73
2014	1.56
2015	1.56
2016	1.43
2017	1.43