Year	% of GDP
1991	16.40802675585284
1992	20.15875223524737
1993	18.281055890148576
1994	16.46092813488302
1995	17.700031293324102
1996	16.08336719047093
1997	18.157767793070207
1998	17.336464866024
1999	15.991015777126998