Year PPG and IMF only, % of exports of goods, services and primary income 1977 16.6464507870721 1978 22.531967886824 1979 27.8579571475897 1980 27.3655701441473 1981 25.9608539924124 1982 30.485594097737 1983 33.7088847522609 1984 36.6691618387101 1985 35.4341472501964 1986 58.3920386395679 1987 55.5523629024058 1988 76.9268806025175 1989 67.858304858391 1990 63.7561072560198 1991 70.9107060359716 2005 11.3754337164802 2006 22.1120781267886 2007 1.12949938908405 2008 1.18792148951873 2009 0.883620050518205 2010 0.604869642548672 2011 0.587057482219836 2012 0.85269267100008 2013 0.420903660427935 2014 0.357873559647895 2015 0.470565361269334 2016 0.475447714255933 2017 0.420083668294517 2018 0.326194747045952