Year % of GNI 1990 15.7465092321896 1991 15.0019202799173 1992 19.9303006901162 1993 15.1286196985327 1994 14.8048204817343 1995 13.9299152850822 1996 14.567267668576 1997 14.8710034751043 1998 14.5499777618162 1999 14.9575279484152 2000 15.4338775535552 2001 15.1738221039074 2002 15.6674301671949 2003 14.8780880750779 2004 13.9657436528907 2005 13.4352643626293 2006 12.4429516570056 2007 12.1762983364725 2008 11.1816797184787 2009 11.7029372620537 2010 11.9973853499192 2011 11.6183369983052 2012 12.1536070820911 2013 12.0065696624162 2014 12.1679218855547 2015 13.2848364474926 2016 13.5950979003499 2017 12.9946532521681 2018 12.8332142694834 2019 12.503445448227 2020 12.8134086189214 2021 12.9399001236888