Year % of GDP 2000 3.830854431399854 2001 3.4517466983669713 2002 3.4381481699833323 2003 3.61578788906996 2004 3.6550478861882763 2005 3.4767482132174674 2006 3.435046622119464 2007 3.3988163877317104 2008 3.5769343840301726 2009 3.6123168131153487 2010 3.699789802137332 2011 3.660604015004488 2012 3.723835042407881 2013 3.838156154607534 2014 3.676873662539743 2015 3.706089854484571 2016 3.741124859564516 2017 3.7488327258487213 2018 3.6102844855739065 2019 3.6736895139830117 2020 3.7335693317898615 2021 4.0626111704019925 2022 3.5759897828863343