Year Per Capita 1970 4940 1971 5186 1972 5428 1973 5700 1974 5693 1975 5796 1976 6410 1977 7100 1978 7797 1979 8508 1980 9239 1981 9418 1982 9544 1983 9468 1984 9582 1985 9488 1986 9779 1987 10490 1988 10850 1989 11300 1990 11310 1991 10170 1992 10360 1993 10920 1994 11640 1995 12230 1996 12120 1997 12490 1998 12830 1999 13160 2000 13730 2001 15160 2002 16140 2003 16110 2004 16470 2005 16500 2006 17180 2007 17720 2008 18460 2009 18210 2010 18760 2011 18850