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_19212 ( "Name" text, "2011 Census" real, "2006 Census" real, "% change" text, "Land area (km\u00b2)" text, "Density (pop/km\u00b2)" text, "Population rank" real )

### Question ###
When the 2006 census had a population of 422204, what was the density (pop/km ) ?

### Accurate SQL ###

SELECT COUNT("Density (pop/km\u00b2)") FROM table_19212 WHERE "2006 Census" = '422204'