Year Per 100 People 1960 0 1965 0 1970 0 1975 0 1976 0 1977 0 1978 0 1979 0 1980 0 1981 0 1982 0 1983 0 1984 0 1985 0.1282 1986 0.25053 1987 0.34326 1988 0.48185 1989 0.65987 1990 0.95415 1991 1.48471 1992 2.2022 1993 2.79849 1994 3.50059 1995 4.80012 1996 7.46718 1997 14.43692 1998 28.51493 1999 52.79261 2000 75.80606 2001 80.77554 2002 82.80869 2003 88.96932 2004 97.26408 2005 104.98386 2006 112.02531 2007 119.25239 2008 129.71231 2009 136.60631 2010 145.5538 2011 153.93366 2012 159.52948 2013 154.72531 2014 150.03214 2015 155.21552 2016 163.79449 2017 170.84792