Year	per Person
1965	2.22667
1966	2.40435
1967	2.58325
1968	2.75254
1969	2.94841
1970	3.26616
1971	3.44721
1972	3.91371
1973	4.45758
1974	4.13286
1975	3.52286
1976	3.21041
1977	3.18319
1978	3.13108
1979	3.55362
1980	3.39355
1981	3.03988
1982	2.97768
1983	3.10553
1984	3.27769
1985	3.31163
1986	3.27136
1987	3.39837
1988	3.52885
1989	3.38943
1990	3.34955
1991	3.32381
1992	3.42301
1993	3.56236
1994	3.67565
1995	3.81554
1996	3.89742
1997	4.03636
1998	4.14505
1999	3.97322
2000	4.05391
2001	4.05225
2002	4.23328
2003	4.43344
2004	4.5306
2005	4.40659
2006	4.61289
2007	4.70292
2008	4.57662
2009	4.52237
2010	4.69114
2011	4.91624
2012	5.2317
2013	5.53304
2014	5.88068
2015	5.99755
2016	6.01353