Year current US$ 1974 39999.9991059303 1978 219999.998807907 1979 90000.0035762787 1981 79999.9982118607 1982 59999.9986588955 1983 19999.9995529652 1984 19999.9995529652 1987 9999.99977648258 1990 680000.007152557 1991 9939999.5803833 1992 12659999.8474121 1993 12000000 1994 17530000.6866455 1995 28459999.084472697 1996 34369998.9318848 1997 44569999.6948242 1998 7460000.03814697 1999 8659999.84741211 2000 7230000.01907349 2001 3869999.8855590797 2002 4500000 2003 12130000.1144409 2004 21299999.237060502 2005 11270000.4577637 2006 278250000 2007 17350000.3814697 2008 26649999.6185303 2009 25010000.2288818 2010 24639999.3896484 2011 35380001.0681152 2012 34939998.626709 2013 32569999.694824196 2014 42750000 2015 24149999.6185303 2016 38590000.1525879 2017 34340000.1525879 2018 45500000 2019 35130001.0681152 2020 42630001.0681152 2021 45290000.9155273 2022 29700000.762939498