Year	per person
1800	1.011
1820	1.011
1913	1.562
1950	1.666
1951	1.558
1952	1.611
1953	1.638
1954	1.572
1955	1.63
1956	1.674
1957	1.698
1958	1.662
1959	1.698
1960	1.73
1961	1.664
1962	1.683
1963	1.822
1964	1.904
1965	1.89
1966	1.949
1967	1.993
1968	1.984
1969	2.137
1970	2.107
1971	2.114
1972	2.085
1973	2.033
1974	1.992
1975	1.903
1976	1.869
1977	1.85
1978	1.705
1979	1.482
1980	1.401
1981	1.42
1982	1.496
1983	1.561
1984	1.383
1985	1.364
1986	1.323
1987	1.355
1988	1.396
1989	1.443
1990	1.45
1991	1.417
1992	1.413
1993	1.479
1994	1.52
1995	1.656
1996	1.752
1997	1.791
1998	1.822
1999	1.899
2000	1.932
2001	1.966
2002	2.034
2003	2.056
2004	2.105
2005	2.173
2006	2.324
2007	2.432
2008	2.552
2009	2.637