Year	% of GDP
1981	46.5973045511977
1982	45.8466660453781
1983	41.9302768822713
1984	35.0262510943789
1985	29.3234589806468
1986	32.3406539487584
1987	33.116499553363
1988	29.5081481017842
1989	38.3817374430191
1990	37.315385830153
1991	37.4838327180976
1992	35.0278441919432
1993	31.2980445527027
1994	30.9943381239213
1995	30.2802783823501
1996	26.9717313906183
1997	27.077081513635
1998	25.372952405956
1999	28.3469027282194
2000	33.5918723784199
2001	24.8489968294695
2002	23.023481004315
2003	23.7962003615829
2004	25.7680826658934
2005	25.1392486288241
2006	28.2047344374142
2007	19.6275622050272
2008	20.5999244568919
2009	17.8206051775111
2010	17.9323173998804
2011	18.1188949181858
2012	20.2662125635562
2013	14.8775193013973
2014	15.7213520279912
2015	12.6589654945939
2016	11.8851896606115
2017	13.1976270021686