CREATE TABLE table_21531764_1 (october_2012 VARCHAR2, october_2010 VARCHAR2)

For the area which was 9.1 in October 2010, what is the figure for October 2012?
SELECT october_2012 FROM table_21531764_1 WHERE october_2010 = "9.1"
SELECT "october_2012" FROM "table_21531764_1" WHERE "9.1" = "october_2010"