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

which sum had the greatest population change from 2005 to 2009 ?
SELECT "sum" FROM table_204_381 ORDER BY "population\n(2009)" - "population\n(2005)" DESC LIMIT 1
SELECT "sum" FROM "table_204_381" ORDER BY "population\n(2009)" - "population\n(2005)" DESC NULLS LAST LIMIT 1