Year	% of GDP
1976	30.2503470615456
1977	27.5478113047174
1978	27.068231841526
1979	30.133069828722
1980	26.4039453111044
1981	32.293103644233
1982	44.2374868828358
1983	48.8867477824349
1984	47.8958235381644
1985	48.6842446914771
1986	40.5038768123836
1987	37.0394735709591
1988	30.1433931393873
1989	27.5009969434636
1990	26.8101514156931
1991	34.4582527350028
1992	36.4488129128041
1993	38.6167391478111
1994	40.0112797546137
1995	43.7041353861158
1996	42.0133779493651
1997	47.6183198488616
1998	51.6322784088563
1999	51.0376674375029
2000	43.4746397384026
2001	54.1899129287411
2002	49.9659080618413
2003	56.6329963916159
2004	63.959576327545
2005	61.5452646093929
2006	62.6863609207222
2007	68.3482473944776
2008	70.1317327702914
2009	73.7271913699453
2010	69.5896844658856
2011	65.1211903367139
2012	63.643107462244
2013	58.898381982218
2014	57.8719684191391
2015	66.6032938743363
2016	70.7084659927199
2017	70.9936465363101
2018	71.3566541625974