Year	per person
1800	0.7566
1820	0.7566
1913	0.8045
1950	0.8244
1951	0.8571
1952	0.8901
1953	0.9258
1954	1.087
1955	1.02
1956	1.133
1957	1.178
1958	1.186
1959	1.172
1960	1.207
1961	1.26
1962	1.31
1963	1.335
1964	1.445
1965	1.518
1966	1.587
1967	1.65
1968	1.673
1969	1.725
1970	1.775
1971	1.697
1972	1.799
1973	1.796
1974	1.858
1975	1.884
1976	1.837
1977	1.677
1978	1.865
1979	1.869
1980	1.536
1981	1.774
1982	1.838
1983	1.65
1984	1.679
1985	1.731
1986	1.678
1987	1.615
1988	1.64
1989	1.61
1990	1.624
1991	1.666
1992	1.635
1993	1.618
1994	1.622
1995	1.654
1996	1.694
1997	1.747
1998	1.226
1999	1.295
2000	1.386
2001	1.358
2002	1.263
2003	1.23
2004	1.233
2005	1.248
2006	1.247
2007	1.223
2008	1.238
2009	1.248