Year	per Person
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0.5908
1978	3.14866
1979	4.56754
1980	5.52584
1981	5.47845
1982	5.2446
1983	5.15228
1984	5.64632
1985	5.67455
1986	5.63185
1987	6.05116
1988	6.0621
1989	6.12003
1990	5.39921
1991	5.2756
1992	5.41619
1993	5.17121
1994	5.56406
1995	5.73209
1996	7.66137
1997	8.74383
1998	8.94325
1999	9.75055
2000	9.96051
2001	10.75203
2002	12.98609
2003	14.36816
2004	15.49754
2005	16.67788
2006	17.07678
2007	17.22141
2008	18.8831
2009	19.46167
2010	19.75592
2011	18.42107
2012	20.60053
2013	19.27695
2014	19.05293
2015	20.27756
2016	19.97833