Year	per person
1800	1.642
1820	1.642
1950	1.696
1951	1.717
1952	1.738
1953	1.757
1954	1.776
1955	1.795
1956	1.811
1957	1.828
1958	1.846
1959	1.862
1960	1.879
1961	1.897
1962	1.915
1963	1.932
1964	1.952
1965	1.97
1966	1.989
1967	2.009
1968	2.028
1969	2.048
1970	2.069
1971	2.09
1972	2.111
1973	2.131
1974	2.15
1975	2.168
1976	2.226
1977	2.271
1978	2.312
1979	2.369
1980	2.424
1981	2.466
1982	2.487
1983	2.503
1984	2.521
1985	2.542
1986	2.547
1987	2.553
1988	2.559
1989	2.565
1990	2.571
1991	2.576
1992	2.637
1993	2.823
1994	2.915
1995	2.986
1996	2.981
1997	3.059
1998	3.073
1999	3.229
2000	3.33
2001	3.433
2002	3.545
2003	3.659
2004	3.799
2005	3.971
2006	4.23
2007	4.477
2008	4.735
2009	5