Year	% of GDP
1970	0
1971	0.005851059553985978
1972	0.008790623600052908
1973	0.014083331567327157
1974	0.0748360160094079
1975	0.14019396628864092
1976	0.16306815874114974
1977	0.18440781955972685
1978	0.3198910940862233
1979	0.4762570117052344
1980	0.4172817455907258
1981	0.1568324983507672
1982	0.05043207252858995
1983	0.12029687868741727
1984	0.1825064960993502
1985	0.23046467042107704
1986	0.3928972738182874
1987	0.37626816809704433
1988	0.30211071684659546
1989	0.3271236010339422
1990	0.4243486992556251
1991	0.3648449501016883
1992	0.36947335742598914
1993	0.4189906444484668
1994	0.4371078331588837
1995	0.380941842609127
1996	0.4403222801826068
1997	0.47936095590003697
1998	0.38602141719398153
1999	0.41338429139870275
2000	0.6296968807080009
2001	0.5497526084005727
2002	0.47118450940428014
2003	0.5605589568476169
2004	0.5879938303781149
2005	0.570258812034627
2006	0.43699708411061317
2007	0.3489091596070282
2008	0.3212143724527063
2009	0.2898622796965249
2010	0.282673036724891
2011	0.2562744091300029
2012	0.22829215828894484
2013	0.21053271976340682
2014	0.27567145597276466
2015	0.30650761962381834
2016	0.226529374412015
2017	0.22023822578200986
2018	0.2979478665905043
2019	0.29655505920063435
2020	0.23011683504414251
2021	0.3504869865538321