Year	per 1,000 people
1990	45.22
1991	44.86
1992	44.5
1993	44.14
1994	43.78
1995	43.42
1996	43.06
1997	42.7
1998	42.1
1999	41.4
2000	40.9
2001	40.2
2002	39.6
2003	38.8
2004	38.1
2005	37.3
2006	36.7
2007	35.855
2008	33.45
2009	33.406
2010	33.727
2011	33.382
2012	32.894
2013	32.521
2014	32.477
2015	32.726
2016	31.921
2017	30.973
2018	30.126
2019	29.466
2020	28.8
2021	28.236
2022	27.69