Annual % of GNI
1975 23.12481510068398
1976 23.508511100592287
1977 23.187493725165712
1978 23.55761501064133
1979 23.385235162937455
1980 22.40722043797774
1981 20.777387456403382
1982 20.50784630218521
1983 20.697454604090805
1984 21.221557513070533
1985 21.34098613046427
1986 22.22047790197128
1987 21.77484706187399
1988 22.764437133993262
1989 23.088446761931163
1990 23.33174596323584
1991 22.624222355402857
1992 21.987217274672524
1993 21.5419531500014
1994 21.828471486544714
1995 22.71697878437779
1996 22.430829169130938
1997 22.948434012916312
1998 23.278079903111678
1999 22.93391227355738
2000 22.81628342744768
2001 22.781426092792753
2002 22.655207214920082
2003 22.175728700045738
2004 22.942308426083454
2005 22.87472991604538
2006 23.660340124300124
2007 24.362664673359397
2008 23.136942329334442
2009 20.815976987276287
2010 21.426080451010648
2011 22.195589085715174
2012 21.94010360843182
2013 22.174635383918652
2014 22.85117433737568
2015 23.675566004400547
2016 24.141720511835512
2017 24.734502212657528
2018 25.177429766724245
2019 25.536733230792876
2020 24.672868995397263
2021 26.587916404884986
2022 25.22708007487004
2023 25.577107344303208