Year	per person
1800	2.763
1820	2.857
1913	8.457
1970	71.02
1971	70.6
1972	72.54
1973	74.46
1974	75.1
1975	72.4
1976	72.02
1977	71.56
1978	70.19
1979	67.62
1980	66.19
1981	62.9
1982	60.36
1983	58.26
1984	56.62
1985	55.85
1986	56.19
1987	58.28
1988	60.35
1989	62.02
1990	62.52
1991	61.6
1992	59.3
1993	55.95
1994	55.03
1995	54.96
1996	56.66
1997	61.53
1998	63.56
1999	66.11
2000	66.37
2001	73.01
2002	75.63
2003	78.78
2004	82.08
2005	85.53
2006	89.15
2007	88.79
2008	90.68