Bulgaria directly enumerated people by ethnicity from 1900 all the way up to its most recent census in 2011 , with the exception of the 1985 census .
Bulgaria enumerated people by mother tongue in 1880 and 1887 and used this info to determine their ethnicities .
Bulgaria directly enumerated people by ethnicity from 1900 all the way up to Bulgaria 's most recent census in 2011 , with the exception of the 1985 census .
Bulgaria enumerated people by mother tongue in 1880 and 1887 and used this info to determine their ethnicities .