Year	per 1,000 people
1990	1.002
1991	1.193
1992	1.35
1993	1.499
1994	1.597
1995	1.685
1996	1.68
1997	1.717
1998	1.73
1999	1.732
2000	1.644
2001	1.53
2002	1.538
2003	1.589
2004	1.662
2005	1.775
2006	1.893
2007	1.937
2008	1.97
2009	2.004
2010	2.026
2011	2.129
2012	2.14
2013	2.184
2014	2.256
2015	2.358
2016	2.359
2017	2.42
2018	2.467
2019	2.474
2020	2.441