Year current US$ 1970 90000.0035762787 1971 90000.0035762787 1972 189999.99761581398 1973 340000.00357627904 1974 509999.99046325695 1975 449999.988079071 1976 1639999.98569489 1977 810000.002384186 1978 2890000.10490417 1979 2259999.99046326 1980 4960000.03814697 1981 5579999.92370605 1982 3359999.89509583 1983 4940000.05722046 1984 3970000.02861023 1985 3619999.8855590797 1986 14779999.7329712 1987 16000000 1988 18510000.2288818 1989 10409999.8474121 1990 24149999.6185303 1991 6190000.05722046 1992 9250000 1993 9619999.88555908 1994 6960000.03814697 1995 15010000.2288818 1996 9720000.26702881 1997 11989999.7711182 1998 14100000.3814697 1999 5800000.19073486 2000 5900000.09536743 2001 11960000.038146999 2002 10420000.076293899 2003 12789999.961853001 2004 16889999.3896484 2005 20450000.762939498 2006 19500000 2007 22379999.1607666 2008 37900001.5258789 2009 45689998.626709 2010 29979999.5422363 2011 26879999.1607666 2012 15050000.1907349 2013 6420000.07629395 2014 4250000 2015 29999.999329447703 2016 2769999.98092651 2017 569999.992847443 2018 4110000.1335143996 2019 4909999.84741211 2020 3579999.92370605 2021 1149999.97615814 2022 2069999.9332428002