Year	per person
1800	1.115
1820	1.115
1913	1.723
1950	1.818
1951	1.896
1952	1.929
1953	1.977
1954	2.06
1955	2.104
1956	2.153
1957	2.203
1958	2.234
1959	2.329
1960	2.37
1961	2.378
1962	2.449
1963	2.453
1964	2.445
1965	2.58
1966	2.703
1967	2.645
1968	2.86
1969	3.071
1970	3.127
1971	3.05
1972	2.969
1973	3.011
1974	3.082
1975	3.118
1976	2.969
1977	2.957
1978	2.91
1979	3.017
1980	3.098
1981	3.224
1982	3.213
1983	3.101
1984	3.076
1985	2.925
1986	2.76
1987	2.839
1988	2.847
1989	2.842
1990	2.845
1991	2.549
1992	2.344
1993	2.372
1994	2.4
1995	2.125
1996	1.578
1997	1.26
1998	1.225
1999	1.119
2000	1.135
2001	1.269
2002	1.534
2003	1.587
2004	1.653
2005	1.732
2006	1.811
2007	1.879
2008	1.933
2009	1.96