Year % of GNI 1993 3.356648614844123 1994 2.908822043858423 1995 3.557341788848472 1996 5.32658437943681 1997 4.694021758579574 1999 7.504866224666446 2000 18.958989742818428 2001 13.56336539827127 2002 16.40637562617524 2003 14.733067145284828 2004 18.06758179071136 2005 20.979405590850497 2006 20.46098144292807 2007 11.07409857762547 2008 13.455237797314789 2009 9.43031815391733 2010 10.19781767892539 2011 12.567073676490601 2012 11.13277859393948 2013 9.2407235007627 2014 8.76261530478753 2015 4.389106907011696 2016 5.52877721194639 2017 7.49528638432548 2018 11.42685411324711 2019 9.73024673225527 2020 6.85603147204135 2021 15.2460671057618