Year current US$ 1990 113651495.565237 1991 116254033.94098 1992 116893900.663023 1993 110345273.601865 1994 105940798.307482 1995 109925035.67453 1996 111515278.560536 1997 108974719.321741 1998 104694634.76548 1999 96937485.2967348 2000 92909324.1693977 2001 85429549.7062865 2002 77484569.62006 2003 74385334.7253129 2004 74528769.1674457 2005 74362957.1462454 2006 79981316.7160723 2007 85235263.6388232 2008 98786866.6269422 2009 96427127.3969464 2010 102189822.105115 2011 118027199.375167 2012 126250146.731397 2013 137035681.324807 2014 138981148.68283 2015 136290434.431908 2016 139575445.105741 2017 154984653.084673 2018 166500157.209591 2019 172076844.090153 2020 167547486.475279 2021 170788485.507253