Year current US$ 1960 0 1961 0 1966 0 1967 0 1987 0 1988 0 1989 0 1990 0 1991 109999.999403954 1992 140000.000596046 1993 670000.001788139 1994 850000.005215406 1995 1099999.98658895 1996 5270000.08709729 1997 589999.996125698 1998 2330000.00938773 1999 3630000.05297363 2000 5819999.85128641 2001 6319999.96304512 2002 8580000.03919005 2003 11470000.231638601 2004 25589999.515563298 2005 25819999.5048344 2006 19150000.1493841 2007 40030000.235885404 2008 37979999.225586705 2009 20609999.3251264 2010 25220000.227913298 2011 16260000.1469254 2012 16919999.3647635 2013 20070000.1865625 2014 17440000.258386098 2015 9409999.90142882 2016 13699999.889358899 2017 19039999.8612702 2018 14869999.6471405 2019 13179999.819025401 2020 60250001.5199184 2021 9779999.65287745 2022 22109999.775886558