Year	per person
1800	1.035
1820	1.035
1913	1.4
1950	1.661
1951	1.681
1952	1.709
1953	1.783
1954	1.788
1955	1.79
1956	1.836
1957	1.8
1958	1.863
1959	1.878
1960	1.905
1961	1.88
1962	1.871
1963	1.863
1964	1.856
1965	1.854
1966	1.828
1967	1.834
1968	1.853
1969	1.837
1970	1.827
1971	1.697
1972	1.623
1973	1.762
1974	1.81
1975	1.856
1976	1.9
1977	1.724
1978	1.814
1979	1.774
1980	1.777
1981	1.967
1982	2.145
1983	2.222
1984	2.181
1985	2.109
1986	2.261
1987	1.869
1988	1.689
1989	1.648
1990	1.556
1991	1.547
1992	1.424
1993	1.226
1994	1.097
1995	1.32
1996	1.355
1997	1.393
1998	1.433
1999	1.471
2000	1.456
2001	1.305
2002	1.594
2003	1.722
2004	1.765
2005	1.917
2006	1.996
2007	2.221
2008	2.235
2009	2.668