CREATE TABLE table_2393 ("District" TEXT, "Capital City" TEXT, "Area  ( km\\u00b2 ) " FLOAT, "Area  ( sq.mi ) " FLOAT, "Population  ( 2005 est ) " FLOAT, "2-letter abbreviation" TEXT, "3-letter abbreviation" TEXT)

What was the 2005 established population in cyo?
SELECT "Population (2005 est)" FROM table_2393 WHERE "3-letter abbreviation" = 'CYO'
SELECT "Population (2005 est)" FROM "table_2393" WHERE "3-letter abbreviation" = 'CYO'