Year current US$ 1973 9999.99977648258 1974 79999.9982118607 1975 79999.9982118607 1976 230000.004172325 1977 680000.007152557 1978 1500000 1979 1139999.98569489 1980 479999.989271164 1981 3400000.09536743 1982 759999.990463257 1983 2009999.9904632599 1984 3259999.99046326 1985 1330000.04291534 1986 3569999.9332428 1987 5139999.8664856 1988 3539999.96185303 1989 5360000.1335144 1990 10100000.3814697 1991 3430000.0667572 1992 5849999.90463257 1993 12100000.3814697 1994 8699999.80926514 1995 14359999.6566772 1996 11539999.961853001 1997 7949999.80926514 1998 5030000.20980835 1999 5530000.20980835 2000 6840000.15258789 2001 11140000.3433228 2002 5460000.03814697 2003 4889999.8664856 2004 2980000.01907349 2005 11239999.7711182 2006 4409999.84741211 2007 4550000.19073486 2008 3750000 2009 11720000.2670288 2010 23770000.4577637 2011 18700000.762939498 2012 13300000.1907349 2013 4500000 2014 17120000.8392334 2015 9250000 2016 12909999.8474121 2017 22920000.0762939 2018 13539999.961853001 2019 16780000.6866455 2020 17620000.8392334 2021 13720000.2670288 2022 11840000.1525879