Year	% of GDP
2000	3.955105381599588
2001	3.8543984426304574
2002	3.916667983022187
2003	3.9826317235199435
2004	3.8919800920135987
2005	3.88267137573973
2006	3.7315464927403887
2007	3.557911117434642
2008	3.727574962270239
2009	4.126697527095549
2010	4.019935540875157
2011	4.142319064085447
2012	4.337180429719061
2013	4.468904897008703
2014	4.556697838054579
2015	4.717823604867949
2016	4.7540008055738925
2017	4.818915707863528
2018	4.917928687072116
2019	5.066156525199617
2020	5.35199790509294
2021	5.259768861619203