Year	per person
1800	1.125
1820	1.125
1913	1.738
1950	1.825
1951	2.164
1952	1.872
1953	1.775
1954	1.927
1955	2.014
1956	2.065
1957	2.071
1958	2.033
1959	2.02
1960	2.035
1961	1.926
1962	1.967
1963	2.002
1964	2.128
1965	2.084
1966	2.277
1967	2.317
1968	2.405
1969	2.471
1970	2.567
1971	2.639
1972	2.681
1973	2.721
1974	2.753
1975	2.642
1976	2.647
1977	2.78
1978	2.914
1979	2.906
1980	2.948
1981	2.899
1982	2.957
1983	2.863
1984	2.806
1985	2.821
1986	2.918
1987	2.987
1988	3.062
1989	3.1
1990	3.134
1991	3.077
1992	2.943
1993	2.864
1994	2.873
1995	2.929
1996	2.985
1997	2.984
1998	2.972
1999	2.954
2000	2.891
2001	2.86
2002	2.823
2003	2.832
2004	2.889
2005	2.98
2006	3.114
2007	3.272
2008	3.264
2009	3.275