In January 2013, the Qatar Statistics Authority estimated the country's population at 1,903,447, of which 1,405,164 were males and 498,283 females. At the time of the first census, held in 1970, the population was 111,133.
A metallic taste in the mouth can be attributed to many factors, but the most common causes of this are: 1  Excessive Iron levels in the blood.  Side effect of medications (especially ones used to treat high blood pressure, arthritis and anti-depressants)
The most common reason of sour taste in mouth after eating is gastrointestinal acid reflux syndrome. Your stomach may produce excess acid, which leaks out into the food canal. It may results in sour taste in mouth. It is also a cause of constant sour taste in the mouth.