Year	% of GNI
1977	27.998237815299156
1978	23.72870511428226
1979	25.820580347827033
1980	27.86065784319677
1981	26.210683998469197
1982	22.973989869869836
1983	21.86241056322418
1984	21.560882499832623
1985	21.497549743387786
1986	18.659983365180175
1987	19.57436416844328
1988	19.2215713859595
1989	20.18937450659545
1990	20.71740382648466
1991	19.16634810118228
1992	19.21004634156758
1993	20.882731559752834
1994	21.49542609092877
1995	22.702607920428356
1996	23.56379385285395
1997	23.542576721255042
1998	22.59382416510763
1999	22.52208851227767
2000	23.559564141973308
2001	22.598649937417147
2002	23.57266321594986
2003	24.27386744510771
2004	26.155254892940714
2005	28.45917012849607
2006	30.181126840621282
2007	30.098964557556005
2008	30.480019310748602
2009	27.271864573583322
2010	29.207815374161065
2011	29.472523347049524
2012	28.852051579399525
2013	27.41219383197233
2014	26.497428247291534
2015	25.578530936056655
2016	25.6385284332867
2017	26.59541472961063
2018	27.38813680480455
2019	26.873428605465932
2020	25.449474967753563
2021	26.932145306349867