CREATE TABLE table_1940144_1 (change_since_2006 VARCHAR, county VARCHAR)

How many places did the rank change since 22006 for County Leitrim?
SELECT COUNT(change_since_2006) FROM table_1940144_1 WHERE county = "county Leitrim"
SELECT COUNT("change_since_2006") FROM "table_1940144_1" WHERE "county Leitrim" = "county"