CREATE TABLE table_22978 ("Rank 2011" FLOAT, "Change since 2006" TEXT, "Urban Area" TEXT, "County" TEXT, "Population 2011" FLOAT, "Increase since 2006" TEXT)

How many places did the rank change since 22006 for County Leitrim?
SELECT COUNT("Change since 2006") FROM table_22978 WHERE "County" = 'County Leitrim'
SELECT COUNT("Change since 2006") FROM "table_22978" WHERE "County" = 'County Leitrim'