Year	% of GDP
1990	21.109724340898936
1991	24.66426370559851
1992	23.398358383967594
1993	23.892992509993142
1994	24.50478579106311
1995	23.651578725299455
1996	24.491072825188265
1997	25.389252167245306
1998	25.1890916660884
1999	25.707623182361083
2000	22.548014231285478
2001	21.777174056362668
2002	23.207875942395926
2003	23.15179986052116
2004	21.88248978518324
2005	21.564159449289946
2006	22.591802621895233
2007	22.500646697922004
2008	24.747292627182375
2009	24.188923456662355
2010	24.871512027009125
2011	23.99677224057364
2012	23.977797084655784
2013	22.40207410552734
2014	25.712130602518464
2015	24.429533361585914
2016	26.95236102646205
2017	25.565730985427244