Year current US$ 1968 4210000.03814697 1969 1399999.97615814 1970 1620000.00476837 1971 1850000.02384186 1972 2359999.89509583 1973 1600000.02384186 1974 1970000.02861023 1975 2740000.00953674 1976 2140000.10490417 1977 2109999.89509583 1978 2529999.97138977 1979 4059999.94277954 1980 4349999.90463257 1981 4900000.09536743 1982 2490000.00953674 1983 1750000 1984 2210000.03814697 1985 939999.997615814 1986 949999.988079071 1987 1259999.9904632599 1988 2779999.97138977 1989 2029999.97138977 1990 3000000 1991 1850000.02384186 1992 2390000.10490417 1993 1259999.9904632599 1994 1679999.94754791 1995 1990000.0095367401 1996 1860000.01430511 1997 2289999.96185303 1998 1070000.05245209 1999 1340000.0333786 2000 1100000.02384186 2001 899999.976158142 2002 1100000.02384186 2003 1210000.03814697 2004 1350000.02384186 2005 1480000.01907349 2006 1259999.9904632599 2007 1120000.00476837 2008 1649999.97615814 2009 1549999.95231628 2010 1620000.00476837 2011 1690000.0572204601 2012 536962.032318115 2013 1003371.95396423 2014 260010.68949699402 2015 1056601.04751587 2016 448257.595300674 2017 357871.383428574 2018 396964.311599731 2019 422149.270772934 2020 419674.307107925 2021 976148.307323456 2022 3755452.63290405