Year	% of GDP
1977	36.9917904075093
1978	37.5549226862181
1979	43.3367914208533
1980	44.225962809725
1981	46.3098270602971
1982	49.4021688798454
1983	53.1201831768338
1984	56.1349175927829
1985	59.5470194587239
1986	68.4687844304926
1987	70.5555760933333
1988	68.7980816144836
1989	72.2698555764254
1990	76.8322170228973
1991	78.65257341112
1992	81.2925770484133
1993	87.8601416720996
1994	86.0749328306542
1995	87.5226080129822
1996	93.1900888218311
1997	102.661743045107
1998	111.055823013038
1999	111.802674542374
2000	109.611771156184
2001	111.937362351783
2002	125.568215373891
2003	130.861386443756
2004	122.659136105595
2005	117.273839859529
2006	115.113118149249
2007	111.433733048597
2008	106.672546791473
2009	126.725886849814
2010	125.499074870046
2011	125.689138604962
2012	134.003675106856
2013	141.418652839654
2014	152.388474150185
2015	175.832400714758
2016	193.619783112262
2017	194.283077652289
2018	196.811353091343