Year	Percent of GDP (Units)
1990	28.264
1991	34.265
1992	34.162
1993	29.407
1994	30.260
1995	29.757
1996	27.694
1997	28.973
1998	28.827
1999	28.027
2000	27.367
2001	27.989
2002	28.474
2003	32.640
2004	31.329
2005	28.176
2006	26.334
2007	25.704
2008	22.929
2009	26.742
2010	28.638