Year	% of GDP
1971	0.48013735071049424
1972	0.6019159126824788
1973	0.49288982232093886
1974	0.4765790089760188
1975	0.4445721023353552
1976	0.5019658132778411
1977	0.4008442858917931
1978	0.5320887480094855
1979	0.5690759563761579
1980	0.43787585851999655
1981	0.4705489520440356
1982	0.35121576234463303
1983	0.38192322075379664
1984	0.6518530539010289
1985	0.7502464069720327
1986	0.8982122141199447
1987	0.6363604476637439
1988	0.8535350121420611
1989	0.9532812671168421
1990	1.3567356847494831
1991	1.2465239062467917
1992	0.8957405143386397
1993	0.8516672760849825
1994	0.900484414690076
1995	1.5399189602302785
1996	2.4253797979871496
1997	2.239116968843203
1998	4.332506142333399
1999	6.351048977618122
2000	5.039682143632245
2001	3.6099502898544493
2002	0.827656897295726
2003	1.5710027669428281
2004	0.3222650254809218
2005	3.1236242308138333
2006	4.941234731920647
2007	4.1059786087527375
2008	2.61729656084704
2009	2.9237818313312816
2010	4.313451553259245
2011	2.878087143079997
2012	2.809136340747515
2013	2.498612666431949
2014	2.762892358411156
2015	3.8975941883853538
2016	3.2254833248991575
2017	3.945145396952675
2018	4.929693035207757
2019	4.442741211806481
2020	3.7291553934297887
2021	4.648438590017494
2022	4.403496182684617