Year	per 1000 people
1980	1.673
1981	1.738
1982	1.808
1983	1.858
1984	1.88
1985	1.944
1986	2.016
1987	2.066
1988	2.093
1989	2.134
1990	2.125
1991	1.954
1992	1.996
1993	1.976
1994	1.962
1995	1.969
1996	2.06
1997	2.055
1998	1.915
1999	1.806
2000	2.383
2001	2.374
2002	2.4
2003	2.444
2004	2.4
2005	2.5
2006	2.47
2007	2.59
2008	2.661
2010	2.851
2011	2.903
2012	2.979
2013	3.021
2014	3.126