Year % of GNI 1976 25.657165462533055 1977 28.631962446577454 1978 31.4952492319889 1979 30.710464077363746 1980 25.333602449344063 1981 24.856774369644643 1982 26.667090520095353 1983 30.401298505568494 1984 32.55551845905245 1985 32.75906540583685 1986 36.200178710277946 1987 39.650317480607 1988 41.74063000976088 1989 38.834113367655874 1990 39.06532473244282 1991 39.07741524927292 1992 38.18416136509886 1993 38.24900073273512 1994 37.99234036321435 1995 37.82146681685488 1996 36.092393243096815 1997 36.10784860415351 1998 38.21809844757745 1999 35.770259697910554 2000 34.121896996319336 2001 32.155253930226344 2002 31.57157605667251 2003 33.09734915208609 2004 35.52383025545487 2005 34.00580471272516 2006 32.98688973363678 2007 33.53851155228558 2008 33.31344268830656 2009 33.33311032075486 2010 34.992236478406966 2011 34.45801958208983 2012 34.305067073148074 2013 34.62837782692014 2014 34.81856359731047 2015 36.23532251477357 2016 36.65123683645619 2017 36.86379918694687 2018 35.711296931021664 2019 34.48277125937976 2020 35.91518532023606 2021 36.342379465484605 2022 33.949825556645095 2023 33.15363369261966