Year	per person
1971	331.2
1972	376.3
1973	423.1
1974	474
1975	526.2
1976	593.1
1977	629.1
1978	663.1
1979	738.8
1980	774
1981	789.4
1982	899.8
1983	954.1
1984	1058
1985	1068
1986	969.6
1987	1053
1988	1106
1989	1133
1990	1178
1991	1186
1992	1155
1993	1187
1994	1174
1995	1327
1996	1408
1997	1225
1998	1322
1999	1282
2000	1261
2001	1260
2002	1215
2003	1227
2004	1167
2005	1214
2006	1260
2007	1281
2008	1381