Instructions: Given a text, write a compressed version of it in a single sentence.
Input: Each year the Postal Service conducts a City Carrier Survey (CCS) of delivered mail volume by route. Between 1993 and 1996, the Postal Service conducted the survey using a relatively small panel of about 400 routes.
Output:
Between 1993 and 1996, the Postal Service conducted the survey using a relatively small panel of about 400 routes.