CREATE TABLE table_203_9 (id DECIMAL, "state" TEXT, "last execution date" TEXT, "name" TEXT, "crime" TEXT, "method" TEXT)

which state had an execution done by the method of lethal injection and occurred in december of 2005 ?
SELECT "state" FROM table_203_9 WHERE "last execution date" = '5 december 2005' AND "method" = 'lethal injection'
SELECT "state" FROM "table_203_9" WHERE "last execution date" = '5 december 2005' AND "method" = 'lethal injection'