Qatar's official statistics as of October 2008 have Qatari's population at around 1.42m

Locals at around 320k

The locals male to female ratio is 1/1.3 (female gene is stronger).

The expat male ratio to female including locals is around 1.9/1 (Because there are so many male labourers here)

You can also find info here About Qatar

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Mr. Q's Blog - A Qatari's view on Qatar.