Year US Dollars adjusted for inflation) 1960 27838.39304 1961 28436.71658 1962 29006.57984 1963 28640.87802 1964 31041.95 1965 31740.63552 1966 35659.16125 1967 39616.14199 1968 39686.95535 1969 40290.56883 1970 42055.03047 1971 43819.35839 1972 44942.91915 1973 45948.83383 1974 46699.09897 1975 48824.50177 1976 52988.74551 1977 55903.55906 1978 56504.09149 1979 57503.21894 1980 61083.45095 1981 62106.1318 1982 58400.28398 1983 59061.16971 1984 58826.95497 1985 57167.10189 1986 60463.90879 1987 62224.89178 1988 64196.23243 1989 63939.81157 1990 63429.27677 1991 61503.63836 1992 61913.77723 1993 63435.47315 1994 63374.76685 1995 65690.96417 1996 66969.93314 1997 69624.43634 1998 71810.38407 1999 73825.18485 2000 79988.35001 2001 84844.73838 2002 83048.80311 2003 85321.24327 2004 86733.37007 2005 87616.38597 2006 91944.87381 2007 94029.60803 2008 94903.19153 2009 89391.21118 2010 88207.32756 2011 86001.17117 2012 81547.85524 2013 79251.78166