[prlambert]

Not sure why you think that? The nomadic population is between 25%-30%, two sources: 1) World bank gives 25% "around one quarter of households live nomadic life in Mongolia" https://blogs.worldbank.org/opendata/counting-uncounted-how-...; 1) Wikipedia gives 30%, "Approximately 30% of the population is nomadic or semi-nomadic" https://en.wikipedia.org/wiki/Mongolia.

Population of of Ulaanbataar is 1.6M, Mongolia as a country is 3.3M. So just under 50% live in the capital city.