Year	% of GDP
1977	20.87730912945561
1978	22.214358877693716
1979	24.74419892529112
1980	25.32398163153633
1981	27.290816910081396
1982	27.921874698843567
1983	29.682125465111593
1984	27.59122938477398
1985	27.593680514350794
1986	23.60898785437349
1987	22.824776452870783
1988	27.863356420412256
1989	34.30748179534703
1990	38.82083624462177
1991	39.50872994472159
1992	41.77321349452497
1993	43.68143969106378
1994	43.77663523906922
1995	46.49599978413675
1996	45.42532027319842
1997	47.226520957864246
1998	47.09538086868617
1999	46.86285235835892
2000	50.43326632384464
2001	47.8556420445267
2002	48.16869157320232
2003	45.37726282175761
2004	45.454692164931814
2005	48.58615745965897
2006	50.41464201655151
2007	49.120689806716996
2008	48.956600463984614
2009	48.91654676258993
2010	53.10260775651939
2011	55.61499737575494
2012	59.1161340964342
2013	57.62100490560428
2014	53.67474166642945
2015	51.30624182357414
2016	46.94585491894949
2017	51.00952286268188
2018	47.170534355222046
2019	40.408382036762255
2020	53.2435469890846
2021	50.06003121623244
2022	47.04989233406331
2023	42.112720723986