For these countries, concessional finance continues to represent the bulk of external financial resources, accounting for 72% of total external finance supplied by OECD countries in 2013. By contrast, in other countries, concessional finance represents only 11% of total external finance (OECD, 2015e). By contrast, in all countries, concessional finance represents only 17% of total external finance. According to the same data, ODA represented the equivalent of 77% of tax revenue in fragile LDCs and 55% in non-fragile LDCs. In order for LDCs, in particular, to realise the SDGs, concessional finance needs to be targeted strategically and help to leverage additional domestic and international resources. Note that the group "Mainly LMlCs" actually refers to other IDA-eligible countries that are not LDCs or fragile.