Year	per Person
1980	9.02082
1981	10.64949
1982	10.88033
1983	11.34485
1984	11.23601
1985	10.32407
1986	11.89357
1987	12.0422
1988	10.67874
1989	10.47234
1990	8.2179
1991	8.20758
1992	7.80428
1993	7.62408
1994	8.60142
1995	8.14362
1996	8.0737
1997	7.66838
1998	7.60506
1999	7.48716
2000	7.07678
2001	7.02424
2002	6.62363
2003	6.49902
2004	6.55022
2005	6.60876
2006	6.49199
2007	6.97972
2008	7.07662
2009	7.27775
2010	7.29779
2011	6.82813
2012	6.52384
2013	5.92334
2014	5.46862
2015	5.05147
2016	4.95061