Year	% of GDP
1980	8.25582396727964
1981	8.25590942413347
1982	8.25589840470284
1983	8.25586414186105
1984	8.25587900897639
1985	8.2559031456773
1986	8.2559136672716
1987	8.25591480269334
1988	8.25592570529528
1989	8.25592151823257
1990	8.25587470510014
1991	8.25591885860435
1992	8.25590008755555
1993	8.25590441210873
1994	8.25590309231811
1995	8.25587898127602
1996	8.25591201052978
1997	8.25588309775284
1998	8.25587315351405
1999	8.25587300688531
2000	8.25588162643355
2001	8.25590219126955
2002	8.25588919020138
2003	8.25589372427508
2004	8.25589942266182
2005	8.25588987426467
2006	8.25589565846546
2007	5.90003049431601
2008	8.57711389280677
2009	10.3143859055779
2010	11.0450182372895
2011	10.3090805761126
2012	9.60233025008741
2013	7.97968097379056
2014	8.50742850230085
2015	6.91183231393627
2016	8.00093575415929
2017	8.95334872360137