Year	per 1,000 people
1990	0.845
1995	0.924
1996	0.947
1997	0.968
1998	0.978
1999	0.992
2000	1.002
2001	1.011
2002	0.973
2003	0.982
2004	1.009
2005	1.034
2006	1.086
2007	1.18
2008	1.262
2009	1.385
2010	1.519
2011	1.654
2012	1.827
2013	2.023
2014	2.169
2015	2.326
2016	2.502
2017	2.697
2018	2.892
2019	3.126
2020	3.305