Year	% of GDP
1977	-32.4794380504887
1978	-18.2248837802996
1979	-33.2829459711202
1980	-36.6365584625441
1981	-22.7838649718451
1982	-22.3929786141617
1983	-18.7009918438955
1984	-10.6125761353248
1985	-4.43503407972753
1986	-5.89703596068023
1987	-12.9348601035817
1988	-5.86941385593951
1989	-21.7587955213845
1990	-9.19434021440046
1991	-16.2882971920237
1992	-8.53458224718949
1993	-15.1727401394329
1994	-19.9748196987807
1995	-12.0882831438303
1996	-11.1773763823959
1997	-23.1773021547873
1998	-24.5168985389784
1999	-16.0691344365286
2000	-5.31355239999188
2001	-7.79360301354028
2002	-7.90374162857986
2003	-14.2263334658081
2004	-16.797274568505
2005	-16.459816133158
2006	-18.6369706757354
2007	-27.744396132283
2008	-31.7284634224371
2009	-29.0012455202674
2010	-30.2395990757622
2011	-28.6631520352175
2012	-30.8543209010792
2013	-32.3442153333217
2014	-26.2864282601235
2015	-16.4230146030249
2016	-20.22041750689
2017	-20.0032661037625