Year	% of GNI
1977	18.749321820323793
1978	13.842524935691895
1979	15.602964104021739
1980	17.920005064434257
1981	16.16536205882094
1982	12.16963338278402
1983	10.719498801682015
1984	10.274214561654109
1985	9.70869766140419
1986	6.220660550530901
1987	7.424206619023387
1988	7.259494769360606
1989	8.447243945172657
1990	9.371946562172571
1991	8.35278124560709
1992	8.779556809882903
1993	10.107370304279257
1994	10.697981401344512
1995	11.150801453255658
1996	12.31169294196032
1997	12.387933190138066
1998	10.80152603033158
1999	10.753550704910563
2000	12.155346540073134
2001	10.29255566924985
2002	11.125424181916285
2003	11.70985678789897
2004	13.643288715184825
2005	16.374453460431887
2006	18.292745006314778
2007	18.28734113863367
2008	18.568992755551847
2009	14.709083680383399
2010	17.029973717534265
2011	17.567562394797545
2012	16.507917724793906
2013	14.896672016152305
2014	13.684645812438562
2015	13.100006605556574
2016	13.349338039732249
2017	14.257365053996736
2018	15.024729174581957
2019	14.366574951849351
2020	12.3657061369454
2021	13.594233872206832