Year current US$ 2000 1287.0585654094807 2001 1323.7296782708033 2002 1472.1036075788256 2003 1837.2652185212628 2004 2087.565132390681 2005 2178.784393050047 2006 2282.8745177453475 2007 2586.9075739603304 2008 2935.3248906544254 2009 2904.327810875467 2010 2818.2251170295904 2011 2987.013062521264 2012 2773.9048368766034 2013 2911.1172049364336 2014 2976.6179544782212 2015 2569.920106536909 2016 2642.9984335091895 2017 2785.9976595005555 2018 3001.393907163018 2019 2954.321777126269 2020 3240.166575279426 2021 3634.8429598214566