Year	per 1000 people
1990	2
1991	2
1992	2.1
1993	2.1
1994	2.2
1995	2.2
1996	2.3
1997	2.4
1998	2.4
1999	2.5
2000	2.6
2001	2.6
2002	3.162
2003	2.6
2006	3.3
2007	3.319
2008	2.735
2009	2.881
2010	2.986
2011	2.982
2012	3.063
2013	3.139
2014	3.196