Year Percent of GDP 2000 30.112 2001 38.267 2002 52.755 2003 38.052 2004 28.195 2005 22.408 2006 16.245 2007 12.45 2008 11.116 2009 9.883 2010 7.537 2011 5.859 2012 8.944 2013 9.675 2014 10.928 2015 14.777 2016 15.603 2017 15.947 2018 18.38 2019 19.556 2020 20.091 2021 20.553 2022 20.931 2023 21.285 2024 21.717