Year	per person
1800	1.524
1820	1.524
1945	4.886
1946	4.916
1947	4.945
1948	4.994
1949	5.04
1950	5.55
1951	5.819
1952	5.871
1953	5.204
1954	5.201
1955	5.359
1956	4.932
1957	4.666
1958	4.672
1959	4.554
1960	4.644
1961	4.635
1962	4.783
1963	4.974
1964	5.094
1965	5.221
1966	5.468
1967	5.673
1968	6.01
1969	6.129
1970	6.293
1971	6.374
1972	6.536
1973	6.815
1974	6.992
1975	7.274
1976	7.654
1977	7.781
1978	7.849
1979	7.667
1980	7.437
1981	7.364
1982	6.922
1983	6.503
1984	6.459
1985	6.306
1986	5.997
1987	6.039
1988	6.142
1989	6.183
1990	6.354
1991	6.54
1992	6.495
1993	6.612
1994	6.775
1995	6.94
1996	7.092
1997	7.294
1998	7.521
1999	7.407
2000	7.445
2001	7.435
2002	7.485
2003	7.567
2004	7.738
2005	7.934
2006	8.142
2007	8.34
2008	8.676
2009	8.788