Year	per Person
1967	4.27635
1968	17.61044
1969	23.11178
1970	22.71459
1971	19.43995
1972	18.03749
1973	17.98161
1974	17.05806
1975	19.14644
1976	19.65197
1977	17.22117
1978	15.05713
1979	13.38092
1980	12.22909
1981	13.35997
1982	12.94695
1983	14.20031
1984	14.50236
1985	16.54346
1986	17.84542
1987	17.91015
1988	18.43079
1989	18.41301
1990	18.89403
1991	18.64798
1992	18.67515
1993	18.71859
1994	18.82912
1995	19.41992
1996	19.83533
1997	19.96201
1998	19.85545
1999	19.82245
2000	20.73421
2001	20.43545
2002	18.8546
2003	16.86403
2004	15.71939
2005	15.13139
2006	14.00702
2007	13.08341
2008	13.43632
2009	13.75678
2010	13.87557
2011	13.3486
2012	12.98835
2013	12.41607
2014	11.66874
2015	11.43647
2016	11.14546