Year	% of GDP
1995	17.001024886342734
1996	18.98230459179641
1997	19.17613656417034
1998	16.99134639547986
1999	16.408325774946306
2000	15.669861424874279
2001	18.289740389841164
2002	18.22314254473096
2003	19.120104148863888
2004	19.465899840736153
2005	20.502588144330076
2006	21.356908921801853
2007	29.182126875567754
2008	30.807119199102832
2009	20.23811665747463
2010	20.039522090224178
2011	21.429414599679532
2012	22.26867307173209
2013	20.02546505090461
2014	20.11253123895536
2015	19.734876574570315
2016	19.437918917869627
2017	20.218497834185847
2018	18.68321568671612
2019	19.45269026558322
2020	18.960413130911185