Year current US$ 1966 19999.9995529652 1967 19999.9995529652 1968 19999.9995529652 1969 39999.9991059303 1970 19999.9995529652 1971 9999.99977648258 1972 39999.9991059303 1973 519999.980926514 1974 569999.992847443 1975 670000.016689301 1976 1029999.97138977 1977 280000.001192093 1978 1559999.9427795399 1979 2309999.94277954 1980 1620000.00476837 1981 1399999.97615814 1982 1669999.95708466 1983 1659999.9666214 1984 1490000.0095367401 1985 1529999.97138977 1986 2599999.90463257 1987 2299999.95231628 1988 1940000.0572204601 1989 920000.016689301 1990 2109999.89509583 1991 1990000.0095367401 1992 3609999.89509583 1993 1929999.94754791 1994 1299999.95231628 1995 5079999.92370605 1996 1350000.02384186 1997 2140000.10490417 1998 2069999.9332428002 1999 2529999.97138977 2000 3380000.1144409203 2001 1399999.97615814 2002 1379999.99523163 2003 2420000.07629395 2004 5989999.771118159 2005 2930000.0667572 2006 3609999.89509583 2007 3640000.10490417 2008 6619999.88555908 2009 5300000.19073486 2010 25180000.3051758 2011 13119999.8855591 2012 8430000.30517578 2013 6369999.88555908 2014 7949999.80926514 2015 5230000.01907349 2016 9329999.92370605 2017 6940000.05722046 2018 10020000.4577637 2019 7019999.98092651 2020 6329999.92370605 2021 5679999.82833862 2022 3339999.91416931