Year	% of GDP
1990	18.67672147585803
1991	18.415419378317456
1992	20.651429555534108
1993	20.247703340670892
1994	18.85493514660859
1995	18.351209036906962
1997	19.405487463984315
1998	17.231535306539186
1999	17.88254778898437
2002	17.111574031088086
2003	16.858250729214543
2004	17.116325321902398
2005	18.99004931432294
2006	19.403590924953047
2007	21.7314747760242
2008	24.068771088743503
2009	21.541484007866355
2010	21.088964089144273
2011	21.453460872022777
2012	21.96528410585918
2013	20.627869014934262
2014	20.353617753206738
2015	19.43746508761964
2016	19.867257761967796
2017	20.129701232229056
2018	20.28612137772082
2019	19.914427943865558
2020	20.022112045672234
2021	19.693529596733732
2022	22.115171308667094