Year	per person
1800	1.529
1820	1.529
1896	1.847
1897	1.994
1898	2.096
1899	2.185
1900	2.273
1901	2.409
1902	2.509
1903	2.645
1904	2.7
1905	2.862
1906	3.052
1907	3.202
1908	3.222
1909	3.236
1910	3.25
1911	3.279
1912	3.352
1913	3.421
1914	3.357
1915	3.601
1916	3.925
1917	4.019
1918	3.992
1919	4.074
1920	4.063
1921	4.166
1922	4.455
1923	4.689
1924	5.05
1925	5.104
1926	5.535
1927	5.546
1928	5.813
1929	6.321
1930	5.51
1931	4.984
1932	4.716
1933	5.162
1934	5.767
1935	6.207
1936	6.4
1937	6.382
1938	6.379
1939	6.311
1940	6.331
1941	6.231
1942	5.986
1943	5.978
1944	6.382
1945	6.507
1946	6.644
1947	6.716
1948	6.821
1949	7.213
1950	7.647
1951	8.038
1952	8.242
1953	8.545
1954	8.559
1955	8.957
1956	9.117
1957	9.31
1958	9.089
1959	8.889
1960	9.839
1961	10.41
1962	10.87
1963	11.05
1964	11.48
1965	11.91
1966	12.55
1967	12.69
1968	12.21
1969	12.18
1970	12.77
1971	12.98
1972	13.02
1973	13.33
1974	13.65
1975	14.33
1976	14.15
1977	13.77
1978	13.42
1979	13.85
1980	14.13
1981	14.39
1982	14.11
1983	11.96
1984	12.23
1985	12.2
1986	13.13
1987	13.95
1988	12.53
1989	10.77
1990	10.01
1991	10.05
1992	9.751
1993	10.1
1994	11.24
1995	11.96
1996	12
1997	12.8
1998	12.6
1999	12.51
2000	12.7
2001	12.53
2002	12.96
2003	13.28
2004	13.51
2005	14.18
2006	15.04
2007	16.05
2008	17.35
2009	17.23