Year	Per 100 People
1960	0.09293
1975	0.54694
1980	0.50199
1981	0.53672
1982	0.57184
1983	0.62301
1984	0.70783
1985	0.72429
1986	1.16246
1987	1.72795
1988	1.94315
1989	2.02874
1990	2.41194
1991	2.59906
1992	3.23846
1993	4.13318
1994	4.86607
1995	5.52853
1996	6.32741
1997	8.14381
1998	9.58131
1999	10.99382
2000	12.55956
2001	14.45339
2002	15.52446
2003	15.58545
2004	15.33152
2005	15.08744
2006	14.88743
2007	14.75296
2008	14.61392
2009	14.46265
2010	14.32589
2011	14.66401
2012	13.66204
2013	12.72375
2014	11.32538
2015	11.9314
2016	11.9957
2017	11.89082