Year % of GNI 1993 15.485586126905881 1994 21.950516616340416 1995 23.715743884496934 1996 22.23981168220448 1997 25.258567683900058 1998 24.772314829408007 1999 24.832074529648153 2000 24.79092543482326 2001 23.94117210399136 2002 24.028552568337254 2003 21.861744282404416 2004 22.025959336845812 2005 24.19318718254097 2006 23.661409089040458 2007 25.81907306291969 2008 24.24512000866258 2009 18.377873517386984 2010 21.717208239821353 2011 22.63863277999397 2012 23.543565050045633 2013 23.936847603908394 2014 24.04411179325704 2015 24.258539556655393 2016 22.449396246386858 2017 22.242974202059166 2018 22.815969016712 2019 21.040250721222193 2020 20.09507692513934 2021 18.73651468604416 2022 15.540744986398106 2023 18.046950670189403