Annual % of GNI
1974 5.546432793554206
1975 5.185248867285609
1976 7.648374911736102
1977 6.680781370363683
1978 4.9384552658067085
1979 1.1525418877783433
1980 38.02935060647321
1981 30.041585260785727
1982 21.822470360941725
1983 22.470305642426986
1984 24.21219074830532
1985 15.84979128453531
1986 19.237181307041862
1987 23.77101185910605
1988 15.64998198724755
1989 42.61788761683696
1990 32.51638473350516
1991 27.156299052146238
1992 34.15676550501387
1993 34.8190248451899
1994 28.968763934383873
1995 4.681348524627225
1996 8.945305195860385
1997 7.074109367111171
1998 7.178395111544382
1999 8.297553820560761
2000 7.888965999090515
2001 14.416499592060202
2002 5.894797335605779
2003 10.35325563675076
2004 16.52984991346542
2005 10.616709956712803
2006 15.317768619595379
2007 19.18536785946214
2008 23.90982869453479
2009 17.866957335954044
2010 16.84653736078265
2011 15.806730740821463
2012 13.310786698786936
2013 8.604463811880082
2014 14.487250900097742
2015 12.933363636990181
2016 16.217210987890184
2017 15.128475207731327
2018 18.720959080734595
2019 16.712148536323454
2020 8.786889926915558
2021 11.446797989770216
2022 15.945606472147595