Year	% of GDP
1991	12.9019264078855
1992	13.6605862176802
1993	13.648138786203
1994	13.3420214321259
1995	15.1721621384417
1996	15.3171999754365
1997	16.5030177833161
1998	16.3000427125081
1999	16.2913414702559
2000	16.0522486490938
2001	17.5455132159575
2002	16.6237873423017
2003	17.2594669491042
2004	19.7863962797603
2005	20.986042828831
2006	21.3290234732979
2007	22.6512845617539
2008	21.9563958006691
2009	21.2420089879323