Year	per 100,000 population
2000	1.9
2001	2
2002	2
2003	2.1
2004	2.1
2005	2.2
2006	2.2
2007	2.2
2008	2.2
2009	2.2
2010	2.1
2011	2.1
2012	2.1
2013	2.1
2014	2.1
2015	2
2016	1.9
2017	1.8
2018	1.8
2019	1.7