Year	per person
1800	0.8176
1820	0.8176
1913	0.8501
1950	0.8634
1951	0.889
1952	0.8923
1953	0.9356
1954	0.9511
1955	0.9957
1956	1.098
1957	1.138
1958	1.116
1959	1.139
1960	1.155
1961	1.177
1962	1.156
1963	1.11
1964	1.174
1965	1.211
1966	1.191
1967	1.25
1968	1.231
1969	1.337
1970	1.58
1971	1.667
1972	1.753
1973	1.764
1974	1.758
1975	1.727
1976	1.671
1977	1.503
1978	1.518
1979	1.491
1980	1.595
1981	1.733
1982	1.73
1983	1.693
1984	1.597
1985	1.645
1986	1.628
1987	1.549
1988	1.633
1989	1.685
1990	1.67
1991	1.715
1992	1.521
1993	1.506
1994	1.579
1995	1.573
1996	1.714
1997	1.738
1998	1.768
1999	1.739
2000	1.635
2001	1.579
2002	1.474
2003	1.312
2004	1.254
2005	1.18
2006	1.135
2007	1.094
2008	0.9356
2009	0.9731