Year	per Person
1980	1.65907
1981	1.61866
1982	1.33328
1983	1.25399
1984	1.17804
1985	1.24329
1986	2.47546
1987	14.96207
1988	14.63422
1989	14.3199
1990	13.97832
1991	13.85353
1992	12.90405
1993	12.88807
1994	12.95548
1995	7.52535
1996	7.40148
1997	7.17755
1998	8.82152
1999	8.69674
2000	8.57808
2001	8.46491
2002	8.35668
2003	8.25236
2004	10.72482
2005	10.8872
2006	10.67702
2007	10.64723
2008	10.67922
2009	10.54683
2010	10.81214
2011	10.87561
2012	12.99315
2013	12.54582
2014	12.03434
2015	11.4362
2016	11.29325