Annual % of GNI
1975 7.852408826302528
1976 14.891660842064008
1977 10.982820343790971
1978 12.39584183484322
1979 12.73769453911683
1980 14.512043250290512
1981 8.23652488539522
1982 2.189085474994229
1983 6.441577446226714
1984 7.8420391487581895
1985 10.474846527828996
1986 13.521414323336906
1987 19.388467494952085
1988 24.701185128750136
1989 25.57651289112574
1990 24.993022481495913
1991 23.905276547823124
1992 22.76857947947405
1993 22.008757071651534
1994 22.528216592183785
1995 25.191512060152697
1996 26.152313793774283
1997 25.8643003803136
1998 23.93070847098564
1999 23.14047897075614
2000 23.31709947426147
2001 23.733255663199166
2002 24.046604245672963
2003 24.794341869626653
2004 26.3710602380553
2005 27.28485115859355
2006 30.957400550918923
2007 30.420125359935437
2008 26.211563202473798
2009 26.062025617409876
2010 27.402178269669008
2011 23.75483478662715
2012 24.828419658101915
2013 23.722573411650952
2014 22.68607331745878
2015 23.305929745726573
2016 21.691263554790314
2017 20.64466808710431
2018 20.441555161469
2019 20.44309014586487
2020 20.356000929565173
2021 17.622122742595902
2022 17.680566291518907
2023 20.375594193213672