Year	% of GDP
1990	50.783253794831396
1991	50.01008035835736
1992	49.6809013594637
1993	51.75980828867473
1994	49.59428270472742
1995	47.49164130283034
1996	45.72330770280789
1997	50.365436127615304
1998	50.31921817351446
1999	51.35295143841484
2000	55.00424649645536
2001	59.017909796884524
2002	62.55277129455731
2003	62.19005389604637
2004	62.592976743388476
2005	62.22652610017373
2006	59.66673027622175
2007	57.497536389246804
2008	57.29221428099495
2009	55.256446111796876
2010	51.59191030038966
2011	51.556553660081164
2012	50.67803056188026
2013	50.31182736270392
2014	49.9009248748135
2015	49.9647183856682
2016	47.63375559151669
2017	47.58360938001722
2018	46.52249866594258