Year	per person
1800	2.512
1820	2.597
1913	7.688
1950	31.92
1951	29.7
1952	31.42
1953	32.31
1954	31.73
1955	32.95
1956	34.42
1957	36.28
1958	36.38
1959	36.28
1960	37.47
1961	38.64
1962	38.85
1963	39.01
1964	42.27
1965	42.43
1966	42.41
1967	42.02
1968	43.84
1969	48.48
1970	48.9
1971	49.71
1972	52.38
1973	56.09
1974	57.99
1975	53.63
1976	54.64
1977	55.44
1978	57.46
1979	58.96
1980	59.26
1981	58.83
1982	59.38
1983	61.13
1984	64.93
1985	66.74
1986	73.15
1987	75.7
1988	81.96
1989	89.33
1990	93.13
1991	100.3
1992	100.6
1993	103.2
1994	105.9
1995	105.6
1996	107.5
1997	115.4
1998	122.3
1999	130.2
2000	140.2
2001	140.2
2002	141.3
2003	143.2
2004	147.6
2005	153.5
2006	159.5
2007	167.3
2008	164.4
2009	155.4