Year	% of GDP
1986	4.42911005020142
1989	4.46868991851807
1991	4.87377023696899
1998	4.03337001800537
1999	5.75268983840942
2000	7.32787990570068
2002	7.38802003860474
2003	8.17488956451416
2005	6.03082990646362
2007	5.43937015533447
2009	5.3761100769043
2010	4.80839014053345
2015	4.95599985122681
2016	5.45266008377075
2017	5.37975978851318
2018	5.22358989715576
2020	5.46400022506714