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)
Ingestion of pine nuts is a recognised cause of a metallic or bitter taste in the mouth that may occur one to three days after eating the nuts. Not everyone gets the problem and why it happens is unknown, but quite a lot of research has been done on the topic (see ncbi.nlm.nih.gov/pubmed/21559093).