Year	% of GDP
1970	1.5769701466106887
1971	6.340384828724138
1972	6.6572565977568186
1973	9.927284744695491
1974	30.857574137209195
1975	24.69318629820747
1976	22.961512026056585
1977	22.299901810191926
1978	20.720016628856442
1979	1.790790251826947
1980	31.756787118203622
1981	12.010185923039815
1982	8.449263770514321
1983	11.365803893649682
1984	13.525196101046818
1985	13.735806927700143
1986	8.21977662380717
1987	10.301026606521045
1988	9.046766625464757
1989	14.099902155603903
1990	14.025042829632094
1991	10.848056105501508
1992	13.162174491406727
1993	15.133213868561068
1994	17.245560687301808
1995	17.069190505212635
1996	18.953046391838942
1997	16.24768962516039
1998	11.179503138636965
1999	13.62364451018747
2000	20.943183583116227
2001	16.980113974671816
2002	16.75164506149862
2003	17.60272235640838
2004	20.211593661112694
2005	23.66612827260139
2006	23.08879762864203
2007	21.07346771789999
2008	23.691754820367407
2009	14.378095441392135
2010	16.94536059967611
2011	21.73607708247028
2012	20.14184048831361
2013	17.172911548616565
2014	14.330651727164968
2015	10.15623650874095
2016	9.897122490127334
2017	12.992036068349178
2018	15.349930743963697
2019	13.513508753581492
2020	8.654543091385566
2021	16.68360108023616