Year	per 1,000 people
1960	0.871
1965	1.263
1970	0.954
1980	1.698
1981	1.412
1982	1.62
1986	1.566
1995	1.783
1997	1.89
2003	1.9
2004	1.5
2005	1.8
2006	1.461
2007	1.879
2008	1.884
2009	1.91
2010	2.47
2011	2.475
2012	2.433
2013	2.45
2014	2.602
2015	2.597
2020	2.293