Year	% of GDP
1976	39.9826549515227
1977	36.2873570598175
1978	24.95722413716088
1979	28.707863784075734
1980	22.223264131027218
1989	18.4939663702145
1990	23.238938040815494
1993	35.72323212988949
1994	35.48710547114119
1995	35.202589851944644
1996	40.17463385408202
1997	36.13514917724499
1998	29.40671921434639
1999	36.78231732246754
2000	37.93825045807001