Year current US$ 1963 -39999.9991059303 1964 589999.973773956 1965 9999.99977648258 1966 150000.005960464 1967 -1159999.9666214 1971 9999.99977648258 1973 19999.9995529652 1974 9999.99977648258 1975 310000.002384186 1976 479999.989271164 1977 32040000.915527303 1978 4440000.05722046 1979 1049999.95231628 1980 1799999.95231628 1981 4320000.17166138 1982 15800000.1907349 1983 15789999.961853001 1984 17639999.3896484 1985 19159999.8474121 1986 15819999.6948242 1987 26899999.6185303 1988 1279999.97138977 1989 -5510000.228881841 1990 -21790000.915527303 1991 540000.021457672 1992 -37060001.373291 1993 -23670000.0762939 1994 10180000.3051758 1995 27000000 1996 25090000.1525879 1997 23379999.1607666 1998 26190000.5340576 1999 22250000 2000 24860000.6103516 2001 23309999.4659424 2002 19600000.3814697 2003 18090000.1525879 2004 18239999.7711182 2005 18629999.1607666 2006 21120000.8392334 2007 26149999.6185303 2008 28020000.4577637 2009 11470000.2670288 2010 7360000.1335144 2011 8750000 2012 6809999.94277954 2013 5010000.228881841 2014 3049999.95231628 2015 3539999.96185303 2016 4010000.2288818406 2017 2779999.97138977 2018 5820000.17166138 2019 4420000.07629395 2020 4739999.771118159 2021 3910000.08583069 2022 4050000.1907348596