Year	per 1,000 people
1999	2.788
2000	2.896
2001	3.11
2002	3.461
2003	3.485
2004	3.478
2005	3.525
2006	3.448
2007	3.447
2008	3.502
2009	3.612
2010	3.714
2011	3.741
2012	3.608
2013	3.553
2014	3.484
2015	3.453
2016	3.509
2017	3.591
2018	3.663
2019	3.698