Year % of GNI 1975 4.81692602496557 1976 7.0353065747483 1977 8.62206701525515 1978 10.0802468917925 1979 17.809174549413 1980 16.2348195527438 1981 16.456620085419 1982 14.7620205304056 1983 17.6960002051177 1984 15.9278340238635 1985 23.9693442490676 1986 27.6027398641192 1987 31.5329643401215 1988 41.7427797668771 1989 40.7152149757851 1990 31.0649385540428 1991 32.0629278893788 1992 27.439240397432 1993 28.0969823571716 1994 16.7736620557619 1995 15.0784892593668 1996 24.5834817106061 1997 25.7337330856896 1998 27.7818038467015 1999 29.9849094081368 2000 30.4372209650116 2001 34.1023827902327 2002 23.0142884323841 2003 18.1850479027645 2004 16.9510281094866 2005 25.8023238032562 2006 26.1298569966938 2007 28.540734354614 2008 19.5784479947569 2009 6.64609720844563 2010 12.9101899004852 2011 20.4945249062087 2012 18.0116193743661 2013 15.1246726553292 2014 18.90061692415 2015 13.2370314235707 2016 10.8289016433682 2017 12.1612602867165 2018 6.89338226760824 2019 5.63782255713915 2020 2.04302808278831 2021 2.61012853651821