Year	% of GDP
1997	20.3129090763085
1998	17.9317776437342
1999	15.5385350011939
2000	14.3477809538876
2001	12.240977231732
2002	14.1782625347913
2003	14.6412754628782
2004	14.1054932641584
2005	15.3135908131833
2006	18.3518916727969
2007	20.4394698049344
2008	19.7553753221619
2009	21.6119225648182
2010	22.3237750257634
2011	23.5848328387345
2012	24.9270563810171
2013	27.859059328804
2014	28.1836821076474
2015	30.8304978674097
2016	32.9508423866167
2017	34.3431256723362
2018	33.6152178137641
2019	35.5550616993441
2020	36.940246093683
2021	35.1504975428107
2022	34.3332804057927
2023	33.3282002808482