Year	per Person
1980	0.5397
1981	0.66609
1982	0.65497
1983	0.66105
1984	0.67107
1985	0.65634
1986	0.79108
1987	0.73738
1988	0.72957
1989	0.69545
1990	0.87207
1991	0.94086
1992	0.88974
1993	0.86499
1994	0.8407
1995	0.78246
1996	0.76456
1997	0.7693
1998	0.72421
1999	0.65557
2000	0.68519
2001	0.70187
2002	0.69793
2003	0.70552
2004	0.67408
2005	0.70564
2006	0.66824
2007	0.63122
2008	0.66062
2009	0.65409
2010	0.64635
2011	0.62375
2012	0.61768
2013	0.60926
2014	0.60548
2015	0.4987
2016	0.48177