Year	% of GDP
2004	60.3803780871121
2005	67.9877377752365
2006	80.6095799083925
2007	89.9167349551399
2008	95.1670550217903
2009	103.521423597436
2010	96.4765267982851
2011	82.4772140122253
2012	75.3168726862107
2013	71.0902312615032
2014	70.0805964743553
2015	75.8134482297916
2016	78.9064183806195
2017	72.8982387590725
2018	71.2789413870513