Year	per Person
1980	1.71432
1981	1.65205
1982	3.93923
1983	3.78195
1984	4.3279
1985	4.57126
1986	5.05738
1987	5.2067
1988	5.42832
1989	5.64041
1990	5.94124
1991	6.06614
1992	6.53613
1993	8.7392
1994	9.08702
1995	9.11097
1996	11.76743
1997	12.61203
1998	13.62461
1999	16.03896
2000	18.44906
2001	19.67374
2002	20.54412
2003	20.98242
2004	22.32631
2005	22.21335
2006	23.57117
2007	23.42299
2008	23.9025
2009	23.90104
2010	23.64828
2011	22.94594
2012	20.908
2013	18.50259
2014	18.0985
2015	17.71916
2016	17.36538