Year	% of GDP
1975	2.6900881527390172
1976	8.495125880840398
1977	10.420016305636489
1978	10.44675431954292
1979	13.734043059027856
1980	15.617984734782889
1981	18.396322212580543
1982	22.201885836615297
1983	20.709305939993193
1984	21.4844763765008
1985	25.443614967789944
1986	24.724321463228158
1987	29.430626645061174
1988	36.23588979418527
1989	39.080957895916605
1990	37.68653673652451
1991	32.09110213987352
1992	30.12315724483054
1993	31.6851880836855
1994	30.318770476059075
1995	35.506583036672886
1996	35.59282573425919
1997	40.40727178485483
1998	42.26962050612949
1999	37.85605318160338
2000	40.510291301460235
2001	41.88081711319133
2002	44.030409527589036
2003	44.61535759037838
2004	40.57754785877925
2005	52.83359310014163
2006	48.23008555609932
2007	55.075331124581595
2008	52.27329763297097
2009	48.01208855217486
2010	39.92720722523547
2011	32.974858196403886
2012	30.59588001353199
2013	30.666076729313595
2014	31.46216647323783
2015	33.90191189556388
2016	37.22761741254114
2017	37.841905430660546
2018	39.46768280630569
2019	37.40853952055454
2020	39.13971313056274
2021	39.86398618343621
2022	39.63308402991641
2023	38.414653156664066