Year	per person
1971	183.5
1972	202.6
1973	226.4
1974	237.4
1975	271.9
1976	308.4
1977	338.5
1978	382.3
1979	403
1980	401.1
1981	400.7
1982	426.2
1983	478.2
1984	493.4
1985	524
1986	551.3
1987	602.8
1988	691.5
1989	733.7
1990	808.6
1991	889.9
1992	932.3
1993	1043
1994	1104
1995	1190
1996	1286
1997	1287
1998	1510
1999	1479
2000	1560
2001	1599
2002	1657
2003	1730
2004	1740
2005	1848
2006	1844
2007	1861
2008	1832