Year current US$ 1972 19999.9995529652 1973 19999.9995529652 1974 29999.999329447703 1975 39999.9991059303 1976 479999.9929964539 1977 179999.9959766861 1978 290000.00096857524 1979 690000.0236928464 1980 220000.00067055196 1981 59999.99865889545 1982 29999.99932944774 1983 29999.99932944774 1984 19999.99955296516 1986 9999.99977648258 1987 9999.99977648258 1988 9999.99977648258 1989 9999.99977648258 1990 9999.99977648258 1992 9999.99977648258 1993 9999.99977648258 1995 189999.99575316918 1996 199999.99552965147 1997 129999.99895691864 1998 69999.99843537805 1999 209999.99530613428 2000 129999.99709427357 2001 159999.9964237213 2002 89999.99798834315 2003 160000.0001490117 2004 149999.9966472388 2005 369999.9954551463 2006 500000.0018626455 2007 420000.0017881394 2008 470000.00067055237 2009 359999.99754130904 2010 400000.0003725289 2011 220000.00067055225 2012 249999.9981373552 2013 189999.99761581418 2014 550000.0063329929 2015 610000.0049918887 2016 609999.9956786629 2017 770000.0014156088 2018 739999.9946355816 2019 659999.9889731405 2020 709999.9934434891 2021 650000.0078231085 2022 69999.99843537807