Year current US$ 1970 330000.013113022 1971 509999.99046325695 1972 1169999.95708466 1973 1250000 1974 400000.00596046395 1975 839999.973773956 1976 1179999.94754791 1977 1970000.02861023 1978 3150000.09536743 1979 4369999.88555908 1980 6369999.88555908 1981 7920000.07629395 1982 8449999.80926514 1983 6590000.15258789 1984 6230000.01907349 1985 7619999.88555908 1986 12899999.6185303 1987 14180000.3051758 1988 12579999.923706101 1989 26010000.2288818 1990 21610000.6103516 1991 29899999.6185303 1992 28250000 1993 32419998.168945298 1994 40150001.5258789 1995 31930000.3051758 1996 28500000 1997 7320000.17166138 1998 5829999.92370605 1999 4889999.8664856 2000 4139999.8664856004 2001 6389999.8664856 2002 4349999.90463257 2003 5329999.92370605 2004 6989999.771118159 2005 13000000 2006 17360000.6103516 2007 18389999.3896484 2008 17670000.0762939 2009 13750000 2010 22799999.237060502 2011 3990000.00953674 2012 8992151.26037598 2013 13347906.1126709 2014 18147253.036498997 2015 15523096.0845947 2016 14021883.0108643 2017 15257309.9136353 2018 11715771.6751099 2019 13335000.038146999 2020 11081999.7787476 2021 10614000.3204346 2022 12300000.1907349