Year	% of GDP
1970	0.2398163988217577
1971	0.23411008009455922
1972	0.2247563084519102
1973	0.26415925894896886
1974	0.43716265089630324
1975	0.5773445357095872
1976	0.6517550302648881
1977	0.613410531175149
1978	0.5343656999048542
1979	0.8114241202313989
1980	0.9309900716864982
1981	0.9949253902240707
1982	0.8289735301327048
1983	0.8837001563325444
1984	0.9073448323240002
1985	0.930566440371753
1986	0.3906503363228734
1987	0.43020609431583656
1988	0.8061853485080117
1989	1.1192040948649986
1990	1.339621881306896
1991	0.7029524817745282
1992	0.6989692177756321
1993	0.7248017757835927
1994	0.6183406207210733
1995	0.7042799768589909
1996	0.8091543656253763
1997	0.7360172881747065
1998	0.2570058989555872
1999	0.4982750507768487
2000	1.2112355306739455
2001	1.22333141863772
2002	1.0790187179814126
2003	1.050814743103393
2004	1.1981046618903792
2005	1.478946888514111
2006	1.8074113414475872
2007	1.7817059835331084
2008	2.536346240445713
2009	1.5817971478727646
2010	1.9357106180519161
2011	2.6609693182984193
2012	2.4956453585210974
2013	2.2053849571309034
2014	1.887543454834284
2015	1.1389294111901633
2016	0.9395803794099045
2017	1.2928496259455184
2018	1.7946942216299024
2019	1.4798147212756576
2020	0.8861407053893793
2021	2.2246362662110912