Year	per Person
1970	1.73786
1971	1.6754
1972	1.70954
1973	1.61868
1974	1.45739
1975	1.3057
1976	1.44931
1977	1.68048
1978	1.97891
1979	2.01664
1980	2.24471
1981	2.43389
1982	2.91047
1983	2.96748
1984	3.06352
1985	3.09532
1986	3.13238
1987	3.2871
1988	3.75328
1989	3.73336
1990	3.84459
1991	4.16495
1992	4.00004
1993	4.46462
1994	5.08919
1995	5.44302
1996	6.12947
1997	6.63936
1998	6.62956
1999	8.34694
2000	11.01986
2001	11.71191
2002	13.56198
2003	18.92213
2004	21.06181
2005	22.93023
2006	27.71068
2007	29.00875
2008	28.71203
2009	29.70223
2010	30.32754
2011	29.0533
2012	28.65857
2013	28.59785
2014	27.95806
2015	26.21514
2016	22.73543