Year	per person
1800	0.7851
1820	0.7851
1913	0.9258
1950	0.9885
1951	1.008
1952	1.027
1953	1.046
1954	1.052
1955	1.098
1956	1.083
1957	1.087
1958	1.117
1959	1.154
1960	1.158
1961	1.166
1962	1.221
1963	1.152
1964	1.177
1965	1.178
1966	1.19
1967	1.243
1968	1.351
1969	1.477
1970	1.52
1971	1.584
1972	1.59
1973	1.633
1974	1.469
1975	1.224
1976	1.129
1977	1.102
1978	1.077
1979	1.059
1980	1.064
1981	1.061
1982	1.014
1983	0.9273
1984	0.8917
1985	0.8027
1986	0.8096
1987	0.855
1988	0.9309
1989	0.9718
1990	0.972
1991	0.9988
1992	0.9011
1993	0.9434
1994	0.9402
1995	0.9208
1996	0.956
1997	1.036
1998	1.139
1999	1.197
2000	1.19
2001	1.318
2002	1.39
2003	1.473
2004	1.558
2005	1.629
2006	1.698
2007	1.786
2008	1.869
2009	1.949