Year	% of GDP
1970	0
1971	0.005851059553985979
1972	0.008790623600052908
1973	0.014083331567327157
1974	0.07483601600940788
1975	0.14019396628864092
1976	0.16306815874114977
1977	0.18440781955972682
1978	0.3198910940862233
1979	0.4762570117052344
1980	0.41728174559072584
1981	0.1568324983507672
1982	0.05043207252858996
1983	0.12029687868741727
1984	0.18250649609935024
1985	0.23046467042107704
1986	0.3928972738182872
1987	0.37626816809704433
1988	0.30211071684659546
1989	0.3271236010339423
1990	0.42434869925562513
1991	0.3648449501016883
1992	0.3694733574259891
1993	0.4189906444484669
1994	0.4371078331588837
1995	0.3809418426091271
1996	0.4403222801826067
1997	0.47936095590003697
1998	0.3860214171939814
1999	0.41338429139870275
2000	0.629696880708001
2001	0.5497526084005727
2002	0.4711845094042801
2003	0.5605589568476168
2004	0.5879938303781149
2005	0.5702588120346269
2006	0.4369970841106132
2007	0.3489091596070282
2008	0.3212143724527063
2009	0.2898622796965249
2010	0.282673036724891
2011	0.2562744091300029
2012	0.22829215828894484
2013	0.2105310433944657
2014	0.27566931770359515
2015	0.3065056648307719
2016	0.22652774938493267
2017	0.2202366052884382
2018	0.2979455181368714
2019	0.2965529001771643
2020	0.23011519222540008
2021	0.35048403312556864