Year	per 1000 people
1960	0.03
1965	0.038
1970	0.108
1975	0.107
1980	0.467
1982	0.549
1985	0.523
1987	0.834
1989	0.883
1990	0.795
1993	0.884
1995	1.13
1997	0.862
1998	0.943
1999	0.977
2000	1.455
2002	1.257
2004	1.581
2005	1.668
2006	1.793
2007	1.892
2008	1.958
2009	2.014
2010	1.991
2011	1.971
2012	1.99
2014	1.541
2016	1.915