Year current US$ 1963 29999.999329447703 1964 39999.9991059303 1965 150000.005960464 1966 150000.005960464 1967 360000.01430511504 1968 289999.99165535 1969 370000.00476837205 1970 509999.99046325695 1971 509999.99046325695 1972 1039999.96185303 1973 970000.028610229 1974 1149999.97615814 1975 1230000.01907349 1976 1210000.03814697 1977 4670000.07629395 1978 3089999.91416931 1979 2349999.90463257 1980 2920000.07629395 1981 2740000.00953674 1982 3289999.96185303 1983 4480000.01907349 1984 4119999.88555908 1985 3769999.98092651 1986 3839999.91416931 1987 8170000.076293951 1988 6030000.20980835 1989 6260000.228881841 1990 10720000.2670288 1991 19790000.915527303 1992 15939999.5803833 1993 7150000.09536743 1994 6590000.15258789 1995 8760000.22888184 1996 12590000.1525879 1997 10760000.2288818 1998 9939999.5803833 1999 8079999.923706049 2000 6429999.82833862 2001 8930000.30517578 2002 10909999.8474121 2003 15699999.8092651 2004 20040000.915527303 2005 15279999.7329712 2006 14119999.8855591 2007 14569999.6948242 2008 17799999.237060502 2009 22229999.5422363 2010 21350000.3814697 2011 21620000.8392334 2012 17950000.762939498 2013 21670000.0762939 2014 22200000.762939498 2015 30409999.8474121 2016 29780000.6866455 2017 26319999.6948242 2018 24639999.3896484 2019 25530000.6866455 2020 20049999.237060502 2021 23260000.2288818 2022 18180000.3051758