Year	% of GDP
2000	79.52973188043073
2001	80.25627131041342
2002	78.74559015499803
2003	75.78076190178683
2004	74.19347000033773
2005	73.1614746015611
2006	71.50674304933636
2007	74.842651427679
2008	77.43870406253231
2009	80.89389595034415
2010	83.41787667165899
2011	82.88883375942795
2012	82.40444688315243
2013	81.8025609953357
2014	79.18175657198569
2015	76.80098081883511
2016	77.89960211225316