Year	per person
1800	2.071
1820	2.071
1913	2.799
1938	10.77
1950	20.56
1965	46.13
1966	43.26
1967	44.33
1968	49.06
1969	54.77
1970	68.98
1971	70.91
1972	70.18
1973	59.64
1974	64.56
1975	66.46
1976	66.15
1977	65.93
1978	71.07
1979	60.38
1980	59.13
1981	54.07
1982	54.45
1983	52.48
1984	52.52
1985	53.94
1986	52.47
1987	54.47
1988	71.94
1989	78.25
1990	79.34
1991	81.33
1992	79.79
1993	78.23
1994	78.3
1995	80.98
1996	79.48
1997	79.27
1998	75.09
1999	74.22
2000	74.31
2001	73.27
2002	72.32
2003	71.22
2004	70.63
2005	70.05
2006	69.29
2007	68.57
2008	67.89