Year	per 1,000 people
1970	0.909
1980	1.068
1984	0.953
2000	1.724
2001	1.896
2002	1.917
2003	2.021
2004	1.954
2005	1.628
2006	1.439
2007	1.476
2008	1.664
2009	1.503
2010	1.431
2011	1.499
2012	1.558
2013	1.83
2014	2.081
2015	2.297
2016	2.468
2017	2.548
2018	2.664
2019	2.759
2020	2.879