Year	% of GDP
1990	19.785219399538107
1991	22.22222222222222
1992	22.82608695652174
1993	28.3248730964467
1994	29.314899117630528
1995	21.891551279622416
1996	17.599653876427627
1997	22.39402448000436
1998	21.86692225857033
1999	23.620121715865892
2000	22.66372156167203
2001	20.67756737241749
2002	20.12999315181171
2003	20.031013433684855
2004	21.79357414615997
2005	22.55825140508798
2006	24.86192236365701
2007	26.350353469808667
2008	28.556723589037126
2009	31.050951043448826
2010	34.58148203334627
2011	34.29787303292161
2012	30.0791228609354
2013	32.64137405069566