Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_1940144_1 ( change_since_2006 VARCHAR, county VARCHAR )

### Question ###
How many places did the rank change since 22006 for County Leitrim?

### Accurate SQL ###

SELECT COUNT(change_since_2006) FROM table_1940144_1 WHERE county = "county Leitrim"