Year	% of GDP
1973	12.364720814957641
1974	9.876479302532644
1975	9.234569926016357
1976	11.937142101537075
1977	14.396650734001792
1978	14.946540645494643
1979	16.095434315950495
1980	15.983320613673314
1981	17.024253731343283
1982	15.900108677018501
1983	15.330269614342862
1984	14.439241083116075
1985	13.604458480209884
1986	12.390729655204586
1987	10.474831659367606
1988	8.451922402144946
1989	7.816084358555699
1990	10.46324438237373
1991	9.28414195963221
1992	7.787254500596845
1993	7.252150653570554
1994	6.647995311079859
1995	6.379386468980321
1996	6.848026465314781
1997	7.671845425092608
1998	7.2051639482760335
1999	5.601190693597283
2000	5.251274859390868
2001	4.572277612883652
2002	4.960113183852813
2003	4.977712899599697
2004	6.468758951014979
2005	6.667483046433034
2012	19.700750133731933
2013	20.013694872127875
2014	22.027560839363737
2015	18.50639742347755
2016	16.78983574212104
2017	15.985252882365241
2018	7.013008996085915
2019	14.389196164586263