Countries with the largest coral reef systems

I was trying to find out the comparison of the total areas of reef coverage by country. The following table extracted from the UNEP (United Nations Environment Program) website, shows twenty countries with the highest total reef areas (areas in square km's)

Source : UNEP, orginal can be found here HERE

A little surprised that the Maldives was quite so low, given the size of the atolls. Other countries of note:

Sudan, ranked 24, total area 2,720

Thailand ranked 26, total area 2,130

Mozambique, ranked 28, total area 1,860

Belize , ranked 33, total area 1,330

Palau, ranked 39, total area 1,150