2 The UN reports that only 16 and 25 percent of international migrants to Oman and UAE, respectively, were female. The primary reason for this is a large male migrant stock: in 2017, 45 percent of the Oman and 88 percent of the UAE population were from immigration. If we look at how this has changed over time (click on the country to see this), we see the share of the population that is female has declined from a ratio close to parity decades ago. in several countries across the Middle East there are many more males than females: in Oman, women are outnumbered 3-to-1 in the United Arab Emirates (UAE) itвЂ™s almost 4-to-1.These are countries where there are large differences in sex ratio at birth. across several countries in South and East Asia вЂ“ most notably India and China вЂ“ there are significantly fewer females than males.There are however a few notable outliers: Most countries have a female share of the population between 49 and 51 percent (within one percentage point of parity). Countries over 50 percent (shown in blue) have more females than males those below 50 percent (shown in red) have fewer females. In the map we see the sex ratio of populations: this is shown as the percentage of the total population which is female. The magnitude and balance of these factors determines the sex ratio of the total population. If in some countries there is a significant amount of imported male-dominant labour, all else being equal, we would expect males to account for more than half of the total population. migration can also affect the sex ratio of the population.This means that all else being equal, we would expect males to account for slightly more than half of the total population. In all countries, there are more male than female births (the extent of which varies by country as we will see below). This means that all else being equal, we would expect females to account for slightly more than half of the total population. differences in mortality rates and life expectancy for women and men.There are three reasons why the sex ratio of populations varies and is rarely equal: And globally in 2017 the share of women in the world was 49.6%. The sex ratio вЂ“ the share of the population that is female вЂ“ varies across the world.

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