Year	% of GDP
1987	29.537749424837813
1988	28.16602565203279
1989	30.11431077209627
1990	26.683798100171703
1991	29.45964055871988
1992	33.75389159447786
1993	30.460531720749213
1994	29.24425323951489
1995	26.642131158259108
1996	26.40512671945629
1997	26.141282317901464
1998	26.33548271168193
1999	28.060621658642475
2000	29.425464879305935
2001	30.024980743523205
2002	30.738240533951494
2003	32.57393235849678
2004	34.3213397401213
2005	34.84641870679171
2006	36.07641144598844
2007	36.802732473485236
2008	37.46294049728354
2009	36.3671650586113
2010	38.39137736922782
2011	38.80203472203888
2012	38.739312736875995
2013	38.298512506807306
2014	38.11502680906143
2015	38.539751150538656
2016	37.76426349665557
2017	37.791378492413855
2018	38.55138493910297
2019	37.76906208374883
2020	38.549662752180055
2021	40.502330894981206
2022	40.81904465411518