Year	per person
1800	1.698
1820	1.698
1913	2.772
1950	6.182
1951	6.552
1952	6.63
1953	6.653
1954	6.585
1955	7.262
1956	8.511
1957	8.992
1958	9.437
1959	9.662
1960	10.52
1961	10.72
1962	10.96
1963	11.3
1964	11.44
1965	11.83
1966	12.17
1967	12.33
1968	12.93
1969	13.29
1970	13.87
1971	13.92
1972	14.52
1973	14.61
1974	15.23
1975	15.34
1976	16.57
1977	17.32
1978	19.04
1979	19.6
1980	20.83
1981	21.52
1982	20
1983	18.16
1984	18.96
1985	17.94
1986	17.15
1987	16.2
1988	15.48
1989	15.33
1990	15.6
1991	16.23
1992	16.16
1993	16.1
1994	16.9
1995	17.7
1996	18.53
1997	19.28
1998	20.33
1999	21.82
2000	23.02
2001	24.17
2002	25.13
2003	28.58
2004	30.65
2005	33.67
2006	38.12
2007	39.78
2008	40.59
2009	39.09