Year	% of GDP
1997	12.753095567410922
1998	19.662391798251726
1999	15.746283015506199
2000	21.719623332270192
2001	21.472739151442475
2002	23.058310709572414
2003	22.13093350533496
2004	20.613430096099837
2005	21.42740228775454
2006	21.26246030410935
2007	20.07040032066024
2008	19.671890064688387
2009	21.426240707984757
2010	21.995510293178363
2011	21.22174431644987
2012	23.770146348635873
2013	25.94846719630763
2014	26.612658369767694
2015	31.333196130017704
2016	32.72530149849426
2017	36.15532084090179
2018	37.6283320133563
2019	39.82886729046528
2020	18.96215647696841
2021	23.17445677807803
2022	34.95020237518665
2023	34.835571988204286