Year current US$ 1967 29999.999329447703 1968 29999.999329447703 1969 50000.0007450581 1970 90000.0035762787 1971 170000.00178813902 1972 239999.994635582 1973 1379999.99523163 1974 3359999.89509583 1975 1179999.94754791 1976 2849999.90463257 1977 2160000.08583069 1978 3759999.99046326 1979 6630000.11444092 1980 10140000.3433228 1981 12159999.8474121 1982 3490000.00953674 1983 3869999.8855590797 1984 2619999.8855590797 1985 7639999.8664856 1986 7050000.19073486 1987 5400000.09536743 1988 6369999.88555908 1989 4829999.92370605 1990 4610000.1335144 1991 3230000.01907349 1992 4710000.03814697 1993 6179999.82833862 1994 2380000.1144409203 1995 8060000.419616699 1996 7210000.03814697 1997 3869999.8855590797 1998 4530000.20980835 1999 9220000.26702881 2000 9819999.69482422 2001 12720000.2670288 2002 4139999.8664856004 2003 10550000.1907349 2004 8670000.07629395 2005 15210000.038146999 2006 18920000.0762939 2007 15880000.1144409 2008 21879999.1607666 2009 26319999.6948242 2010 34810001.373291 2011 23590000.1525879 2012 17629999.1607666 2013 25010000.2288818 2014 17379999.1607666 2015 17129999.1607666 2016 21989999.7711182 2017 20620000.8392334 2018 22350000.3814697 2019 19860000.6103516 2020 24770000.4577637 2021 34569999.6948242 2022 25389999.3896484