Year	per 1000 people
1960	0.871
1965	1.263
1970	0.954
1980	1.698
1981	1.412
1982	1.62
1986	1.566
1990	0.183
1995	1.783
1997	1.89
2003	1.9
2004	1.5
2005	1.8
2006	1.445
2007	1.856
2008	1.846
2009	1.853
2010	2.376
2011	2.402
2012	2.415
2013	2.486
2014	2.608
2015	2.608