Year	per 1,000 people
1960	0.03
1965	0.038
1982	0.549
1987	0.834
1989	0.883
1990	0.799
1995	1.14
1997	0.856
1998	0.921
1999	0.94
2000	1.39
2001	1.431
2002	1.471
2003	1.532
2004	1.568
2005	1.663
2006	1.788
2007	1.884
2008	1.959
2009	2.062
2010	2.034
2011	1.973
2012	1.995
2013	2.01
2014	2.158
2015	2.127
2016	1.96
2017	2.011
2018	2.103
2019	2.086
2020	1.994