Year	Per 100 People
1981	28.74931
1982	28.85512
1983	28.85158
1984	35.53178
1985	37.04407
1986	38.94007
1987	40.05339
1988	43.08065
1989	44.65606
1990	45.47111
1991	49.09645
1992	51.66517
1993	53.65058
1994	55.33447
1995	54.30479
1996	55.10002
1997	57.37183
1998	59.73967
1999	61.85902
2000	62.80514
2001	63.85132
2002	63.90099
2003	64.31907
2004	65.58481
2005	66.51638
2006	67.45943
2007	68.50785
2008	69.47696
2009	70.44304
2010	71.40906
2013	72.1672
2014	72.40034
2015	72.39681