Year	per person
1800	0.9816
1820	0.9816
1913	0.7759
1950	0.7066
1951	0.7341
1952	0.7441
1953	0.7608
1954	0.7886
1955	0.7997
1956	0.8158
1957	0.8324
1958	0.8407
1959	0.8735
1960	0.8705
1961	0.7309
1962	0.779
1963	0.7985
1964	0.8248
1965	0.8335
1966	0.8497
1967	0.9057
1968	0.8772
1969	0.8511
1970	1.06
1971	1.12
1972	1.018
1973	1.088
1974	1.063
1975	1.049
1976	1.11
1977	1.22
1978	1.177
1979	1.145
1980	1.184
1981	1.26
1982	1.227
1983	1.235
1984	1.205
1985	1.318
1986	1.342
1987	1.364
1988	1.378
1989	1.367
1990	1.383
1991	1.418
1992	1.385
1993	1.344
1994	1.283
1995	1.112
1996	1.015
1997	1.016
1998	1.039
1999	0.9987
2000	0.9732
2001	0.966
2002	0.979
2003	0.9367
2004	0.9468
2005	0.9212
2006	0.9495
2007	0.9641
2008	0.988
2009	1.002