Russians in Kyrgyzstan form a minority ethnic group numbering 419,600 individuals according to the 2009 census, representing 9.1% of the total population. Most ethnic Russians migrated to the country during the 20th century. The Russian population has been declining since the 1991 breakup of the Soviet Union due to low fertility-rates and to emigration. 364,500 Russians and Ukrainians lived in Kyrgyzstan, representing 6.2% of its total population.