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 county_public_safety ( county_id number, name text, population number, police_officers number, residents_per_officer number, case_burden number, crime_rate number, police_force text, location text )
TABLE: CREATE TABLE city ( city_id number, county_id number, name text, white number, black number, amerindian number, asian number, multiracial number, hispanic number )

### Question ###
Show the crime rates of counties in ascending order of number of police officers.

### Accurate SQL ###

SELECT crime_rate FROM county_public_safety ORDER BY police_officers