Year % of GNI 1991 15.938508734666728 1996 10.493629154371018 1998 9.220785757715069 2014 8.768557957645456 2015 4.422255507903585 2018 7.018499414643214 2019 6.80387691320987 2020 0.2520208553635489 2021 1.4977051600778761