Year	% of GDP
1991	16.07554323993316
1992	16.51307720426426
1993	16.945293592007758
1994	17.135594279042326
1995	20.404613443787703
1996	19.697710387365476
1997	19.268791223393535
1998	19.621679244713146
1999	20.26345856070477
2000	20.21422215454536
2001	19.902393450186178
2002	19.989355587863564
2003	20.54519492396535
2004	21.142646263116866
2005	21.430649789047454
2006	22.162013895778806
2007	22.96079476629174
2008	19.840616265913926
2009	16.56146006457312
2010	17.50352074454269
2011	18.29741254662642
2012	19.133630872806027
2013	17.95508395475932
2014	18.27018058887812
2015	16.97235767515941
2016	18.921042858446057
2017	17.505546389401093
2018	17.50906730071578
2019	17.79565196351125
2020	17.4550724582775