Year	per 1,000 people
1960	4.66776514053345
1970	5.40140008926392
1986	3.31680011749268
1990	2.7000000477
1993	2.7999999523
1995	2.5
1996	2.1300001144
2000	1.9
2003	1.2999999523
2004	1.3
2005	1.2
2006	1.3
2007	1.2
2008	1.2
2009	1.1
2010	1.2
2011	1.09
2012	1.08
2013	0.89
2014	1.27
2016	1.22
2017	1.04