Year current US$ 2000 4285.4593437591 2001 4603.832079298085 2002 4994.339693426899 2003 5398.147429482699 2004 5739.826568582619 2005 6097.953695047204 2006 6484.9076137706215 2007 6845.951894535182 2008 7065.953945404639 2009 7283.252689418405 2010 7560.760130383695 2011 7763.640722159792 2012 8001.971827594501 2013 8138.932140798961 2014 8468.273666763811 2015 8791.05276053682 2016 9104.027874416319 2017 9399.397409163008 2018 9750.767029708095 2019 10088.651770355134 2020 11131.733293469088 2021 11439.898943730575 2022 11818.205332212747