Year	per 1,000 people
1960	7.83132553100586
1970	6.07740020751953
1981	3.61050009727478
1990	2.5397000313
2000	1.75
2001	1.75
2002	1.75
2003	1.61
2004	1.61
2005	1.61
2006	1.61
2010	1.42
2011	1.42
2012	1.42
2013	1.42
2014	1.4
2015	1.4
2016	1.4
2017	1.4