Year	% of GDP
1991	19.745758808075472
1992	19.029602633175628
1993	18.189131477444132
1994	18.055290508918
1995	18.07623557227599
1996	17.686430012153977
1997	17.755470619767046
1998	17.761708616469292
1999	17.393054270073023
2000	17.507955125145106
2001	17.18953638876492
2002	16.73190492181169
2003	16.313803175661292
2004	16.123138390828814
2005	15.848610108029447
2006	15.813549312556766
2007	15.8516905533029
2008	15.264459029267046
2009	13.87204501008579
2010	14.512988997876144
2011	14.794781888690606
2012	14.588684319556739
2013	14.457636086237066
2014	14.705345293382566
2015	15.301224288636783
2016	15.385361035610067
2017	15.291488726570746
2018	15.158145532714801
2019	14.954404300292296
2020	14.680453309487213
2021	14.913465864982959
2022	15.074392145003998
2023	15.023231382900065