Meanwhile the city's population, estimated at 20 million, has soared.
This is quite an achievement for a population estimated at 250 adults, spread over 12 départements.
The Kibera Tours website describes "a population estimated at one million".
Nassau Library System, serving a population estimated at 1.3 million, is fifth, receiving 6percentt.
The Muslim population, estimated at 5,000 to 10,000, supports about a half-dozen mosques.
Khawazakhela is one of the largest cities in Swat, with a population estimated at more than 500,000.
For a population estimated at 2.5 million, there are said to be at least 500,000 Jakartas in Bamako.
Given the size of Britain's adult population (estimated at about 51m) that remains a big figure, showing considerable household penetration.
The country has Europe's largest Muslim population, estimated at six million.
The largest population, estimated at five million pairs, occurs in the South Sandwich Islands.
Yangon, with a population estimated at 4.3 million in 2009, is the country's main commercial hub.
