Year % of GDP 1999 2.77801990509033 2000 2.57921004295349 2001 2.7396399974823 2002 2.793135046958925 2004 2.81261992454529 2005 3.3096399307251 2006 3.00991988182068 2008 3.251044988632205 2009 3.2549099922180202 2010 3.379944920539855 2011 3.264559984207155 2012 3.47275996208191 2013 3.3275101184845 2014 3.32569003105164 2015 3.546539902687075 2016 3.43478989601135 2017 3.6326149702072152 2018 3.39011991024017 2019 3.48600006103516 2020 3.724725008010865 2021 3.37276005744934 2022 3.378859996795655