Year	per person
1800	2.763
1820	2.857
1913	8.457
1970	42.81
1971	44.7
1972	46.39
1973	49.05
1974	50.87
1975	50.06
1976	52.01
1977	53.61
1978	55.5
1979	57.23
1980	57.94
1981	58.19
1982	59.29
1983	59.66
1984	60.2
1985	60.9
1986	62.04
1987	63.23
1988	65.78
1989	68.14
1990	69.56
1991	69.87
1992	70.41
1993	69.38
1994	70.55
1995	71.72
1996	72.23
1997	73.61
1998	75.95
1999	78.17
2000	80.88
2001	81.93
2002	82.26
2003	82.61
2004	84.09
2005	85
2006	89.08
2007	101.8
2008	111.6