Annual % of GNI
1975 30.420485448071492
1976 28.84075422726618
1977 26.562598559736763
1978 27.2928325798544
1979 27.613068737388847
1980 31.47865458028069
1981 32.12330903911496
1982 30.72371456376843
1983 31.209187358495555
1984 33.68029617299238
1985 32.677190843295016
1986 27.350750454797875
1987 27.223505312242352
1988 26.92962653999636
1989 27.855989899038978
1990 27.560903756867333
1991 26.310128385681992
1992 25.44181656147108
1993 25.491429717975816
1994 26.270545286524897
1995 27.914550801344287
1996 29.846600291762517
1997 31.531785847227756
1998 28.327793339170324
1999 30.362389949108675
2000 37.14133705538041
2001 36.483170817958595
2002 32.7932231380571
2003 31.566191378168238
2004 34.190517405930116
2005 38.659208548928945
2006 40.53027563359491
2007 39.971479119669844
2008 42.411696973439824
2009 35.635728423833115
2010 36.56001017246888
2011 38.61187832790984
2012 39.142808290930724
2013 38.22690733855038
2014 37.94399842746683
2015 34.572469597484115
2016 31.579364320022584
2017 32.670985316842426
2018 35.2653481135986
2019 32.4245539853853
2020 31.14830474836666
2021 39.300192544694816
2022 50.34999150551653
2023 41.40748313617799