Year	% of GDP
2004	13.996405646618609
2005	14.335663408846186
2006	14.395986559394212
2007	15.96253172910701
2008	17.321758732108343
2009	16.50586323278429
2010	17.070051399010236
2011	17.219419049099066
2012	17.49164207661128
2013	21.58621387529194
2014	21.599174552522317
2015	20.931220827141036
2016	21.277375275637773
2017	20.78065335875236
2018	20.87010390318142
2019	22.28517099007724
2020	21.86041927616265
2021	22.001004742313178
2022	21.827190925621913