Year	per person
1800	1.214
1820	1.214
1913	1.876
1950	2.422
1951	2.376
1952	2.331
1953	2.221
1954	2.24
1955	2.194
1956	2.149
1957	2.104
1958	2.136
1959	2.169
1960	2.186
1961	2.207
1962	2.082
1963	2.128
1964	2.22
1965	2.279
1966	2.306
1967	2.272
1968	2.3
1969	2.309
1970	2.296
1971	2.248
1972	2.381
1973	2.373
1974	2.135
1975	2.167
1976	2.198
1977	2.257
1978	2.263
1979	2.375
1980	2.531
1981	2.602
1982	2.802
1983	2.603
1984	2.728
1985	2.845
1986	2.818
1987	2.688
1988	2.682
1989	2.54
1990	2.556
1991	2.591
1992	2.612
1993	2.583
1994	2.563
1995	2.58
1996	2.636
1997	2.704
1998	2.745
1999	2.791
2000	2.867
2001	2.924
2002	3.011
2003	3.04
2004	3.046
2005	3.048
2006	3.077
2007	3.132
2008	3.2
2009	3.196