Year	% of GDP
1970	0.9641550782021988
1971	0.959969191514202
1972	1.0426279748849985
1973	1.4394387412269785
1974	4.1825036879333295
1975	3.8701769779906585
1976	4.093555766640856
1977	4.038077897554223
1978	3.412981701854558
1979	5.691215456625531
1980	6.35987163619492
1981	5.045311473535992
1982	3.5893256367707154
1983	3.6539997441789653
1984	3.4345985956156464
1985	3.166078727256822
1986	1.5252638566794914
1987	1.7702793115141593
1988	1.687489806668832
1989	2.1545219010973335
1990	2.5369498008249436
1991	1.528696300086887
1992	1.524308579397829
1993	1.5709384226951342
1994	1.4226408286512227
1995	1.5074102777481866
1996	1.7709379626996191
1997	1.627112150040418
1998	1.0440138989501666
1999	1.2828605673948412
2000	2.242233476323356
2001	1.954888704062429
2002	1.7732586135494968
2003	1.9976715951539228
2004	2.5179381394488267
2005	3.239910117090778
2006	3.536582583945555
2007	3.6311803605360975
2008	5.012127968677961
2009	2.766933742771797
2010	3.686897843195461
2011	4.819490404238236
2012	4.068375905580812
2013	3.6549190959493654
2014	3.1717741173509157
2015	1.7401902251369552
2016	1.5544909153192532
2017	1.9761256769589595
2018	2.4858788185810625
2019	2.139052834221304
2020	1.466412634897368
2021	3.0369401763034993