Year	per Person
1970	2.62929
1971	3.6993
1972	4.43804
1973	6.0202
1974	7.05805
1975	7.01951
1976	6.91096
1977	7.01575
1978	7.22471
1979	7.55839
1980	5.84348
1981	5.21223
1982	7.97772
1983	8.13966
1984	8.16498
1985	9.67742
1986	10.72017
1987	10.05628
1988	10.3095
1989	10.3702
1990	10.53574
1991	9.77117
1992	11.12626
1993	11.62598
1994	11.61234
1995	11.50969
1996	11.54548
1997	12.05688
1998	12.28935
1999	12.25993
2000	11.87005
2001	11.77695
2002	11.57862
2003	11.12736
2004	10.58266
2005	10.84025
2006	10.63945
2007	10.24143
2008	10.21452
2009	9.70018
2010	9.48937
2011	9.3564
2012	9.50995
2013	10.05237
2014	10.41831
2015	10.19058
2016	9.75953