Year	per person
1800	1.452
1820	1.458
1913	2.502
1938	2.893
1950	228.6
1951	235.7
1952	237.7
1953	248.3
1954	262.8
1955	255.4
1956	260.3
1957	249
1958	236.8
1959	234.1
1960	228.1
1961	206.7
1962	209.3
1963	200.5
1964	200.3
1965	186.3
1966	190.4
1967	177.4
1968	176.5
1969	166
1970	243
1971	244.9
1972	239.8
1973	211.3
1974	173.6
1975	143.8
1976	143.8
1977	130
1978	130.9
1979	139.9
1980	105.1
1981	81.46
1982	68.76
1983	70.98
1984	71.44
1985	64.64
1986	67.09
1987	61.66
1988	61.17
1989	63.08
1990	48.46
1991	64.19
1992	76.61
1993	98.26
1994	101.9
1995	98.59
1996	91.27
1997	88.38
1998	83.46
1999	78.97
2000	79.82
2001	77.3
2002	77
2003	86.76
2004	92.71
2005	98.57
2006	97.39
2007	96
2008	98.21
2009	93.08