Year	Per 100 People
1970	1.76889
1975	3.31552
1976	3.44574
1977	3.56378
1978	3.5992
1979	3.56461
1980	3.53216
1981	3.67039
1982	3.72588
1983	3.787
1984	3.79885
1985	5.18679
1986	5.70353
1987	6.61026
1988	7.5092
1989	8.42703
1990	12.20222
1991	13.57152
1992	14.4496
1993	15.24257
1994	15.88473
1995	16.86613
1996	17.90516
1997	18.97893
1998	19.50019
1999	21.90489
2000	23.08291
2001	24.14898
2002	25.26492
2003	19.55699
2004	17.52227
2005	20.69539
2006	20.78838
2007	21.02488
2008	20.86475
2009	21.06944
2010	19.85363
2011	20.78177
2012	17.72556
2013	17.44329
2014	21.85777
2015	22.7171
2016	18.74265
2017	18.29986