Year	per person
1800	0.8314
1820	0.8314
1913	0.7928
1950	0.778
1951	0.808
1952	0.8238
1953	0.8455
1954	0.8795
1955	0.8933
1956	0.9174
1957	0.9344
1958	0.9507
1959	0.9903
1960	1.076
1961	1.162
1962	1.278
1963	1.45
1964	1.65
1965	1.853
1966	1.906
1967	2.008
1968	2.052
1969	1.966
1970	1.887
1971	1.71
1972	1.475
1973	1.535
1974	1.626
1975	1.865
1976	2.092
1977	2.102
1978	2.267
1979	2.221
1980	2.128
1981	2.052
1982	2.035
1983	2.011
1984	2.42
1985	2.02
1986	2.053
1987	2.12
1988	2.216
1989	2.248
1990	2.254
1991	2.299
1992	2.483
1993	2.572
1994	2.635
1995	2.934
1996	3.694
1997	6.172
1998	7.345
1999	10.14
2000	11.49
2001	15.77
2002	16.89
2003	19.55
2004	25.19
2005	26.31
2006	25.89
2007	30.56
2008	32.87
2009	33.65