Year	% of GDP
1997	0.359109997749329
1998	0.408419996500015
1999	0.328090012073517
2000	0.418879985809326
2001	0.293099999427795
2002	0.244609996676445
2003	0.210639998316765
2004	0.232370004057884
2005	0.228249996900558
2006	0.193729996681213
2007	0.170929998159409
2008	0.223580002784729
2009	0.196789994835854
2010	0.216340005397797
2011	0.222760006785393
2012	0.326759994029999
2013	0.438939988613129
2014	0.516460001468658
2015	0.444119989871979
2016	0.435849994421005
2017	0.354389995336533
2018	0.363669991493225
2019	0.367830008268356
2020	0.372640013694763
2021	0.377189993858337
2022	0.383729994297028