Year	per person
1800	0.7982
1820	0.7982
1913	0.6666
1950	0.6205
1951	0.646
1952	0.6554
1953	0.6711
1954	0.6964
1955	0.7073
1956	0.7219
1957	0.7368
1958	0.7513
1959	0.7593
1960	0.7999
1961	0.7985
1962	0.9031
1963	0.9783
1964	1.036
1965	1.036
1966	1.008
1967	1.094
1968	1.065
1969	1.056
1970	1.055
1971	0.9349
1972	1.089
1973	1.342
1974	1.391
1975	1.248
1976	1.422
1977	1.635
1978	1.841
1979	1.68
1980	1.756
1981	1.73
1982	1.748
1983	1.559
1984	1.649
1985	1.665
1986	1.656
1987	1.697
1988	1.868
1989	2.023
1990	2.062
1991	2.096
1992	2.144
1993	2.174
1994	2.121
1995	2.342
1996	2.52
1997	2.601
1998	2.493
1999	2.529
2000	2.602
2001	2.679
2002	2.796
2003	2.876
2004	3.004
2005	3.103
2006	3.245
2007	3.265
2008	3.349
2009	3.336