Year	% of GDP
1977	34.35448653755343
1978	34.75012955321341
1979	34.37308604260414
1980	34.57301507964501
1981	35.60320671388622
1982	34.35673517041848
1983	33.74333160417882
1984	35.83788365604014
1985	36.174514644188015
1986	35.36758947843002
1987	34.83295255340385
1988	36.57550688617625
1989	36.53133904979101
1990	36.13419964062396
1991	34.1626926938727
1992	32.174443442731246
1993	32.60975093905231
1994	32.48042385614224
1995	32.79706424861953
1996	32.10385688465032
1997	33.390807685789916
1998	34.23724433428249
1999	34.34713133309544
2000	37.55525893035181
2001	34.42705412061053
2002	32.57728347548823
2003	36.39187068425017
2004	36.61781485123021
2005	38.69129776076598
2006	40.593241818505646
2007	35.762438448896496
2008	28.750659014394824
2009	34.59957069312197
2010	39.354412429326736
2011	35.27082696982931
2012	36.23098038458401
2013	35.56364460540259
2014	33.42075241038893
2015	34.8318008012769
2016	33.653212792344384
2017	31.821934176360088
2018	31.387516837369777
2019	31.09476334674885
2020	30.376989812824988
2021	35.250198652262256
2022	34.781503638610374
2023	32.238374665313685