Year current US$ 1999 100000.00149011599 2000 200000.00298023198 2001 300000.011920929 2002 300000.011920929 2003 300000.011920929 2004 400000.00596046395 2005 25500000 2006 23100000.3814697 2007 24299999.237060502 2008 24500000 2009 24549999.237060502 2010 21989999.7711182 2011 23799999.237060502 2012 25500000 2013 24700000.762939498 2014 23799999.237060502 2015 26200000.762939498 2016 27000000 2017 27600000.3814697 2018 31399999.6185303