Annual % of GNI
1975 20.561156730218084
1976 20.50983796400354
1977 21.953270742714036
1978 23.90634616224475
1979 22.254063627778432
1980 22.27599493724015
1981 21.187730550775203
1982 22.651383656792408
1983 22.15275859835601
1984 22.702627437485187
1985 23.399573981706006
1986 24.89036590629156
1987 27.78721631238441
1988 32.5264766285321
1989 34.48883720347305
1990 33.313179592003905
1991 35.06820388894237
1992 34.67568903861314
1993 36.55469278977006
1994 36.45259285338442
1995 36.50854368031411
1996 35.497468506975295
1997 33.24521137472007
1998 33.02552649838723
1999 31.418502179246037
2000 31.401240399167012
2001 29.037567128168394
2002 29.127894285843684
2003 29.165919210930245
2004 29.16671692062659
2005 29.56676422640349
2006 31.62071251318201
2007 33.38605145818868
2008 31.8225973271635
2009 30.337147660241342
2010 30.923000387764287
2011 32.210852922104245
2012 30.320564294250456
2013 29.07941553855825
2014 28.975885779582093
2015 29.569183519269703
2016 31.558949138298484
2017 33.44051339371672
2018 33.295620618935644
2019 32.91068226726522
2020 28.789147779163436
2021 28.522790308341378
2022 27.45394217283979
2023 25.860517397885175