Year % of GNI 1995 12.781499982880481 1996 12.145306139079986 1997 13.84223413435475 1998 15.85626633233894 1999 12.67930708860136 2000 18.38004140258984 2001 19.104694102493422 2002 20.14764362428242 2003 21.031062954654505 2004 21.13233150141495 2005 23.611999732398562 2006 19.665288726655987 2007 21.725816523143095 2008 23.495186845031583 2009 28.28619826864334 2010 21.9023745752646 2011 22.48024495886735 2012 24.05398580605112 2013 21.88933399903545 2014 22.18508311050934 2015 23.300149235470208 2016 22.770062736638483 2017 23.31590011702226 2018 23.394538252094392 2019 22.529850528111012 2020 24.31438386867289 2021 21.46976648469044 2022 21.556695063245755 2023 19.273466575893668