Year current US$ 1972 79999.99821186073 1973 59999.998658895485 1974 160000.00201165676 1975 1179999.9848008202 1976 550000.0044703482 1977 459999.99344348966 1978 770000.0051409003 1979 820000.009611249 1980 1220000.0230222961 1981 789999.997243285 1982 130000.00268220899 1983 59999.998658895485 1984 109999.9975413084 1985 119999.99918043622 1986 119999.99731779107 1987 149999.9966472388 1988 599999.9903142445 1989 589999.9998509873 1990 769999.9883770942 1991 590000.0091642141 1992 330000.0093877312 1993 839999.9942630529 1994 1459999.9971687794 1995 1569999.9798089268 1996 2349999.9642372113 1997 3030000.012367963 1998 2180000.0071525564 1999 3980000.0116229 2000 4779999.937862156 2001 5220000.099390747 2002 8819999.979808932 2003 20880000.455304977 2004 24420000.085607134 2005 25920000.294223428 2006 17689999.647438526 2007 17710000.231862072 2008 21399999.987334013 2009 14649999.793618917 2010 13299999.993294472 2011 22519999.72201883 2012 27799999.579787277 2013 19409999.34449791 2014 20710000.175982755 2015 22229999.752715215 2016 18700000.58412555 2017 30149999.78430573 2018 20860000.43712554 2019 22079999.877139885 2020 22560000.410303514 2021 25349999.763071503 2022 16309999.903664002