Year	per 1,000 people
2000	11.88
2001	11.91
2002	12.32
2003	12.86
2004	12.74
2005	12.93
2006	13.35
2007	13.61
2008	13.89
2009	14.17
2010	14.93
2011	15.46
2012	15.88
2013	16.22
2014	16.46
2015	16.89
2016	17.34
2017	17.54
2018	17.92
2019	18.29
2020	18.71