Year	% of GDP
1988	22.60722996160179
1989	22.682026158913406
1990	21.366073400622955
1991	21.844901726081524
1992	25.806721753693374
1993	24.45696264416804
1994	28.732077016338792
1995	29.227937309993955
1996	29.16143112377577
1997	28.523210684258203
1998	29.755273654819426
1999	29.84745543408227
2000	28.32697105879229
2001	28.992849506654
2002	29.971443046114693
2003	30.56554454568743
2004	31.680335431910596
2005	33.37848172961293
2006	32.95650467383911
2007	34.75672590866159
2008	35.735586164189286
2009	32.35676490791636
2010	34.532562696385085
2011	36.921499711850444
2012	38.45813008925312
2013	36.895626970654156
2014	35.96149780831555
2015	34.783457832828404
2016	32.71349457812788
2017	31.955085126924597
2018	32.736545375931556
2019	31.645445507523572
2020	28.490102521358178
2021	30.912663244017036
2022	33.750756028772514
2023	29.537801798800377