Year	% of GDP
2002	17.650456203102834
2003	17.249143498657713
2004	16.567503060357875
2005	17.0360966985208
2006	17.311582693112403
2007	17.11776581974509
2008	18.392804087760535
2009	18.24405034307812
2010	17.7339247953779
2011	16.76289008526464
2012	17.519958703955435
2013	17.87038517112819
2014	17.040068982947506
2015	16.812715122635122
2016	15.52341427264539
2017	15.791227215076935
2018	15.744449457810813