My reflection on the demographics is twofold:
1- The information which is in the site is an old information. Based on that time (2000) the population was 4.5M but due to the more chance to work and live in the UAE people started to come here.
2- The % of Arab in general is probably less than what the figure mintioned. And we can see that in real life; most of the workers in several businesses are from Asian countries.