Year	% of GDP
2000	3.9557473915592287
2001	3.8548908772115893
2002	3.917096724637567
2003	3.9830290214011694
2004	3.8923884083278932
2005	3.883071559649964
2006	3.7319165417144324
2007	3.5582763322711384
2008	3.7278870467939367
2009	4.126934415323114
2010	4.020169031523501
2011	4.142497043638844
2012	4.3373665346399966
2013	4.469089782932918
2014	4.55687297763886
2015	4.718025714184243
2016	4.7541999361410285
2017	4.819116383287411
2018	4.918115109530255
2019	5.066340430206841
2020	5.352184642492715
2021	5.259957475096731