Year % of GDP 1999 7.532208256870848 2000 11.798037129252387 2001 7.737054389156024 2002 7.142782681942185 2003 7.23971396614447 2004 7.2048350446222775 2005 6.925841207469101 2006 6.646640350331778 2007 6.547153911960035 2008 6.2186483814235824 2009 5.516203228171623 2010 5.8143038660880535 2011 5.629535732077914 2012 5.2554249641521 2013 5.203548512755346 2014 4.92857348332843 2015 4.7619083593220575 2016 4.683563118867368 2017 4.251834007457925 2018 6.491606055085988 2019 8.961138460526879 2020 8.626167357377426 2021 7.967856763805156 2022 7.554483743790728 2023 6.793479501619116