Year	% of GDP
2003	17.877802232047213
2004	16.44976050262394
2005	16.945668929334452
2006	16.245249133358392
2007	14.331322005666555
2008	14.729175006082867
2009	11.586103164538295
2010	13.39820997300753
2011	14.580803630282887
2012	16.192901796050673
2013	15.02702344242183
2014	17.335590245125697
2015	17.037790386468256
2016	18.411738560226517
2017	19.05687533525591
2018	18.43014909748602
2019	18.476368656955337
2020	17.446340121078702
2021	17.48632268149175