Year current US$ 1971 90000.0035762787 1972 219999.998807907 1973 239999.994635582 1974 460000.00834465 1975 600000.023841858 1976 1659999.9666214 1977 2880000.1144409203 1978 2309999.94277954 1979 349999.99403953605 1980 270000.010728836 1981 250000 1982 2109999.89509583 1983 1559999.9427795399 1984 1230000.01907349 1985 779999.971389771 1986 500000 1987 839999.973773956 1988 1120000.00476837 1989 1320000.05245209 1990 949999.988079071 1991 360000.01430511504 1992 579999.983310699 1993 519999.980926514 1994 430000.00715255697 1995 1090000.0333786 1996 990000.009536743 1997 639999.985694885 1998 3490000.00953674 1999 189999.99761581398 2000 610000.014305115 2001 519999.980926514 2002 360000.01430511504 2003 610000.014305115 2004 230000.004172325 2005 189999.99761581398 2006 13359999.6566772 2007 550000.011920929 2008 2460000.03814697 2009 670000.016689301 2010 1029999.97138977 2011 939999.997615814 2012 639999.985694885 2013 1889999.98569489 2014 5550000.19073486 2015 37849998.4741211 2016 52200000.762939505 2017 28280000.6866455 2018 82330001.8310547 2019 11819999.6948242 2020 26260000.2288818 2021 22989999.7711182 2022 24219999.3133545