Year	% of GDP
1997	15.477134020618557
1998	17.01549963669739
1999	18.564733249437516
2000	16.031129900076866
2001	16.00932085541399
2002	18.652327514546965
2003	20.414863748967797
2004	21.944959837610178
2005	21.144065663758322
2006	20.27019592327083
2007	21.09046108728342
2008	21.617237118859737
2009	21.945218591168654
2010	20.074752191170592
2011	21.860233024206686
2012	19.94412949699342
2013	18.505520242264044
2014	19.917646850145836
2015	17.124767963796135
2016	17.740085132284538
2017	19.968372567221337
2018	19.269171366608195
2019	19.338141975816526
2020	11.5574436171576
2021	6.86804526963188