Year current US$ 1977 449999.988079071 1980 930000.007152557 1981 779999.971389771 1982 769999.980926514 1983 589999.973773956 1984 1059999.9427795399 1985 1259999.9904632599 1986 750000 1987 680000.007152557 1988 2200000.04768372 1989 1730000.01907349 1990 2250000 1991 3299999.95231628 1992 1009999.99046326 1993 870000.004768372 1994 4170000.07629395 1995 4909999.84741211 1996 2720000.02861023 1997 2890000.10490417 1998 3539999.96185303 1999 3430000.0667572 2000 3680000.0667572 2001 5630000.11444092 2002 6400000.09536743 2003 6599999.90463257 2004 5599999.90463257 2005 5150000.09536743 2006 5539999.96185303 2007 6000000 2008 9270000.45776367 2009 5519999.98092651 2010 6739999.771118159 2011 6219999.79019165 2012 7226131.91604614 2013 7968478.20281982 2014 8045615.196228029 2015 7400442.6002502395 2016 5971483.70742798 2017 6102197.17025757 2018 5583380.22232056 2019 6726762.77160645 2020 6952070.23620605 2021 6715456.48574829 2022 9880390.16723633