Year	per 1,000 people
1960	3.60545015335083
1970	1.12800002098083
1975	1.02600002288818
1980	1.25769996643066
1981	1.2063000202179
1985	1.20550000667572
1990	1.7977999449
1994	1.6302000284
1997	1.7999999523
2000	1.7
2001	1.7
2002	1.7
2003	1.7
2004	1.7
2005	1.7
2006	1.9
2007	1.9
2008	1.8
2009	1.8
2010	1.8
2011	1.8
2012	1.8
2013	1.8
2014	1.89
2015	1.38
2016	1.4
2017	1.47