Year	% of GDP
1977	25.35678721528967
1978	17.176745108076194
1979	23.32100463870975
1980	19.31965797854261
1981	14.811568273106246
1982	17.4615762397595
1983	13.931652035674022
1984	15.689965897734066
1985	14.15407869047466
1986	13.050078744463342
1987	4.697792076185443
1988	2.5899393311890577
1989	8.095524831891861
1990	8.256159612279083
1991	2.502546378914124
1992	4.954569030476549
1993	7.873117353941342
1994	18.30645746599987
1995	20.540819545514243
1996	15.009549950279148
1997	11.690042732463393
1998	13.945874091017199
1999	11.882173650823107
2000	17.633804358279637
2001	20.860720856502205
2002	22.023417171740025
2003	20.864330646279942
2004	19.562732705497158
2005	18.986058503569346
2006	20.133337851395154
2007	17.50724527067121
2008	13.662617882457742
2009	12.194863880889605
2010	15.841585410284114