Year	% of GDP
1972	19.625292740046838
1973	21.480066012333886
1974	21.669466339320326
1975	23.55575973354772
1976	23.698913605794104
1977	26.52037045485652
1978	27.126695921735976
1979	28.336755646817245
1980	26.33243892105635
1981	26.40557424315233
1982	30.551161435350927
1983	30.77750921825656
1984	30.960326866695777
1985	30.193921604947064
1986	31.227305737109656
1987	29.57325799907906
1988	30.57524882802577
1989	31.867902689287686
1990	30.41227105041745
1991	29.44183958499601
1992	27.656904376249468
1993	28.43688194775967
1994	28.04449278478291
1995	28.374717038670404
1996	28.01644786875272
1997	25.12356494678208
1998	24.913503171886013
1999	24.93661770001249
2000	25.02123437999008
2001	24.832736940251493
2002	25.668972560271357
2003	25.369771465403186
2004	25.775454767820587
2005	26.1510353227771
2006	25.852015683120538
2007	26.17212646271396
2008	27.324996562529396
2009	27.884254872420634
2010	26.738524994178963
2011	32.90453332388645
2012	33.76412302270916