Year	% of GNI
2011	32.629238342525
2012	30.9810640540065
2013	28.3984205184769
2014	31.5369800043276
2015	29.6426303913377
2016	31.0546554650742
2017	30.7727685559501
2018	33.3122169084508
2019	29.2100105782176
2020	27.2843606686644
2021	25.2286794342964