Year	% of GDP
1977	37.7651453165234
1978	38.4953367155862
1979	39.4117537832694
1980	35.7010184181387
1981	33.9780754818688
1982	30.5306462833206
1983	29.5894908312073
1984	28.7066772308936
1985	32.9015044729628
1986	40.4547587946607
1987	37.1042916439492
1988	36.463905965281
1989	31.9208790471425
1990	33.4746518110153
1991	32.4341112076984
1992	32.1016649447383
1993	35.6428608061108
1994	38.9917132783604
1995	36.1805794737721
1996	35.8669651744608
1997	35.4268417868636
1998	37.1646520170404
1999	45.2350204041676
2000	45.3283259733251
2001	37.8778583223035
2002	31.9471451865732
2003	30.3773204532014
2004	33.0046385424712
2005	21.4089183924281
2006	23.2297590691886
2007	27.6196679267603
2008	25.1582134949391
2009	24.2763166740618
2010	23.8338601853319
2011	25.194944184447
2012	25.8151697418801
2013	25.4261893776392
2014	60.1550033867754
2015	58.0056015008462
2016	55.8163270966346