Year	per 1,000 people
2002	14.22
2003	14.67
2004	15.08
2005	15.51
2006	15.84
2007	15.98
2008	16.1
2009	16.45
2010	16.65
2011	16.94
2012	17.07
2013	17.21
2014	17.44
2015	17.87
2016	18.03
2017	18.22
2018	18.3
2019	18.43
2020	18.56
2021	18.89