Year % of GNI 2005 27.5453088879278 2006 28.4081625469496 2007 26.0501241951147 2008 38.2954516313609 2009 14.9025466993446 2010 22.8621425994016 2011 29.4436078283979 2012 28.2593517466899 2013 28.9848957248039 2014 25.7415639666248 2015 14.9039351345778 2016 14.3232096613463 2017 21.4226906982524 2018 28.543174145678 2019 26.0753661347341 2020 10.0244988255914 2021 20.401148603686