Year	per person
1800	1.29
1820	1.296
1913	2.224
1939	2.587
1970	176
1971	176.1
1972	177.8
1973	180
1974	175.9
1975	173.8
1976	177.9
1977	157.1
1978	162.7
1979	161
1980	147.7
1981	144.6
1982	126.5
1983	114.4
1984	107.6
1985	97.32
1986	94.29
1987	89.63
1988	89.11
1989	89.76
1990	88.84
1991	85.55
1992	91.63
1993	89.22
1994	89.46
1995	90.04
1996	92.12
1997	116.1
1998	125.9
1999	126.8
2000	132.4
2001	130
2002	131.6
2003	128.7
2004	147.9
2005	150.6
2006	164.6
2007	168.6
2008	165.5
2009	162.6