Year	% of GDP
1977	3.9523698390700996
1978	3.833436219926252
1979	3.9719447415429667
1980	4.758180843979611
1981	4.5145496362799
1982	4.398587515515928
1983	4.14235956232511
1984	5.291223729756187
1985	5.758885583929223
1986	5.108335374552972
1987	5.602789393122498
1988	5.38260714481457
1989	5.207548475979962
1990	5.316782144833936
1991	4.0044690700991294
1992	5.912349923923204
1993	6.366779437477577
1994	8.520419538472261
1995	8.877985183082613
1996	8.297134457085052
1997	8.916331527756533
1998	10.571243438134003
1999	11.908529435455183
2000	12.08154234693418
2001	12.013711266737937
2002	13.90654338026801
2003	17.050815169056794
2004	19.383216332164885
2005	17.788398644219335
2006	15.13983897355509
2007	15.464733440733605
2008	15.399996344054449
2009	12.205182265873065
2010	15.750839950199824
2011	19.49083651186832
2012	14.591310483537857
2013	13.772749436234506
2014	13.311947646290514
2015	12.34109865418967
2016	11.25682029400606
2017	10.617596564736056
2018	13.19872794073677
2019	11.482518821192794
2020	9.167396097219475
2021	10.867968270728008
2022	11.400773457233344
2023	9.181016711537282