Year	per person
1800	1.204
1820	1.204
1913	1.861
1950	2.948
1951	2.997
1952	3.045
1953	3.093
1954	3.143
1955	3.193
1956	3.241
1957	3.291
1958	3.339
1959	3.373
1960	3.558
1961	3.761
1962	3.791
1963	4.245
1964	4.808
1965	4.508
1966	4.65
1967	4.5
1968	4.953
1969	4.923
1970	5.191
1971	5.185
1972	5.215
1973	5.38
1974	5.309
1975	5.099
1976	5.485
1977	5.521
1978	5.836
1979	5.721
1980	5.931
1981	5.911
1982	5.708
1983	5.289
1984	4.935
1985	4.998
1986	4.972
1987	4.73
1988	4.494
1989	4.326
1990	3.861
1991	3.712
1992	3.614
1993	3.506
1994	3.46
1995	3.598
1996	3.781
1997	3.917
1998	4.036
1999	4.013
2000	3.83
2001	3.75
2002	3.616
2003	3.481
2004	3.464
2005	3.454
2006	3.378
2007	3.331
2008	3.31
2009	3.334