CREATE TABLE table_204_381 (id NUMBER, "sum" NUMBER, "mongolian" NUMBER, "population\ ( 2005 ) " NUMBER, "population\ ( 2008 ) " NUMBER, "population\ ( 2009 ) " NUMBER, "area\ km2" NUMBER, "density\ /km2" NUMBER, "sum centre\ population" NUMBER)

what is the least population of 2009 ?
SELECT MIN("population\n(2009)") FROM table_204_381
SELECT MIN("population\n(2009)") FROM "table_204_381"