Year current US$ 1986 9999.99977648258 1987 9999.99977648258 1988 79999.9982118607 1989 9999.99977648258 1990 129999.995231628 1991 100000.00149011599 1992 189999.99761581398 1993 119999.997317791 1994 1149999.97615814 1995 2269999.98092651 1996 2369999.8855590797 1997 6480000.01907349 1998 7670000.07629395 1999 9340000.15258789 2000 15390000.3433228 2001 18700000.762939498 2002 29370000.8392334 2003 39900001.5258789 2004 48689998.626709 2005 48310001.373291 2006 53810001.373291 2007 68720001.2207031 2008 74180000.3051758 2009 63860000.6103516 2010 56580001.8310547 2011 58779998.779296905 2012 52799999.237060495 2013 55250000 2014 53270000.4577637 2015 40919998.1689453 2016 30100000.3814697 2017 29670000.0762939 2018 24290000.915527303 2019 29700000.762939498 2020 29379999.1607666 2021 32060001.373291 2022 28709999.084472697