Year % of GNI 1990 4.310713811091949 1991 4.611221154705187 1992 4.803397973691579 1993 5.36400070680732 1994 6.2403608198245495 1995 5.410167821746524 1996 5.058780327588296 1997 4.755195396106328 1998 4.031621430975244 1999 4.439280323538705 2000 4.717632477533348 2001 5.676623103016171 2002 5.248856558622526 2003 4.548587479333059 2004 3.729458098092963 2005 3.1836534447911036 2006 3.0840635193197743 2007 2.6874483654251553 2008 2.442086625550955 2009 2.7366822492532705 2010 2.5260889055580416 2011 2.4725337367886477 2012 2.410460390107538 2013 2.2897738353369905 2014 2.333542643317285 2015 2.6188522271548917 2016 2.973535991759723 2017 3.118710521450567 2018 3.385672893077534 2019 3.394473268289536 2020 3.386639891845809 2021 3.280186075361987