Year	% of GDP
1972	2.932084309133489
1973	3.7696516980804304
1974	3.7795580824395913
1975	5.4324107040312395
1976	5.7268494568028965
1977	6.355216935079156
1978	6.880309191191272
1979	5.595482546201231
1980	5.208303911876853
1981	6.093224411340701
1982	7.19756889517942
1983	6.9935251671636
1984	7.042604952903749
1985	6.267899633814457
1986	6.443774090832914
1987	5.274227471282964
1988	4.1047964344271755
1989	3.8269429295404542
1990	4.146749632478711
1991	4.475924447991487
1992	4.376249471026865
1993	4.625929209575121
1994	4.189378896912823
1995	4.355551906543591
1996	4.404630158971588
1997	3.932285537453037
1998	2.1967576276306513
1999	3.910963484446535
2000	3.9730374336637966
2001	4.1982713000529195
2002	4.0107959588100135
2003	3.797507717707191
2004	3.4455501628538694
2005	2.9796279047550813
2006	3.105371512494482
2007	2.8693760089843474
2008	2.8114891122641716
2009	2.5520986004785504
2010	2.3243331508903924
2011	2.2251842142553495
2012	1.7868524791157219