Year	per Person
1968	0.17666
1969	0.4299
1970	0.66649
1971	0.80329
1972	0.8591
1973	0.78537
1974	0.88198
1975	1.26872
1976	1.28755
1977	1.1305
1978	1.06921
1979	0.96407
1980	0.88337
1981	0.88258
1982	0.80481
1983	0.80664
1984	0.78586
1985	0.74493
1986	0.90684
1987	1.01075
1988	1.14105
1989	1.40194
1990	1.625
1991	1.83142
1992	1.94395
1993	2.0737
1994	2.00621
1995	2.0642
1996	1.97848
1997	1.88879
1998	1.83423
1999	1.79519
2000	1.71204
2001	1.78334
2002	1.91598
2003	1.81163
2004	1.31917
2005	1.18434
2006	1.07439
2007	0.99201
2008	0.96574
2009	0.92802
2010	0.88159
2011	0.81236
2012	0.39562
2013	0.13562
2014	0.07602
2015	0.06393
2016	0.05975