Year % of GNI 1991 10.1919454915276 1992 7.98009928312433 1993 7.00888731978316 1994 5.82141920120225 1995 4.33655508772974 1996 5.13613384011217 1997 5.53080495495977 1998 6.59956967787363 1999 7.23598951205279 2000 6.73165324571104 2001 5.25540914435572 2002 6.47088986754473 2003 6.32533692800433 2004 5.81516691985298 2005 5.19828898286344 2006 4.68281891018504 2007 4.44084678588178 2008 4.08556454783823 2009 4.1407881126263 2010 4.04235724489337 2011 4.10358909479186 2012 4.85662640051564 2013 4.3867319800936 2014 4.56669238809476 2015 5.56475374986668 2016 5.3962247743878 2017 4.81280975871942 2018 5.49569777102984 2019 5.06478495685099 2020 5.14073567258898 2021 5.42757831303586