Year	per Person
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0.35337
1979	0.56211
1980	0.67497
1981	0.75216
1982	0.77916
1983	0.91669
1984	1.09596
1985	1.33241
1986	1.49566
1987	1.61452
1988	1.56831
1989	1.56878
1990	1.62855
1991	1.58039
1992	1.64914
1993	1.51507
1994	1.53005
1995	2.0888
1996	2.22568
1997	2.51697
1998	2.61107
1999	2.74808
2000	4.34556
2001	6.41846
2002	6.80894
2003	7.34051
2004	7.28745
2005	7.92786
2006	8.98029
2007	8.8243
2008	8.47839
2009	8.43097
2010	8.6807
2011	8.59274
2012	8.3593
2013	8.43599
2014	7.56313
2015	7.4451
2016	7.20468