Year	% of GDP
1999	4.0162501335144
2000	3.63095998764038
2001	3.97652006149292
2002	3.93932008743286
2008	5.11659002304077
2013	4.61499977111816
2014	5.21700000762939
2015	4.61499977111816
2016	4.34999990463257
2017	3.96199989318848
2018	4.26100015640259
2019	4.39599990844727
2020	4.48099994659424