A much-hyped rescue on Chicago Fire and the season finales of The Amazing Race and Survivor are intended to get viewers to tune in. Broadcasters use the viewership numbers collected during four annual periods to set advertising rates for the rest of the year. In other words, commonly co-occur when networks are trying to make themselves look attractive to advertisers.

Sweeps

Explanation:

Sweeps are type of recording that occurs in certain time periods of months for collecting information about viewers habit of start watching television or listening radio , stop watching television or radio time, watched program information , channel numbers etc.  

According to the question sweeps tend to be present when viewership numbers are gathered for annual period for the year for setting advertising rates.This helps in attaining analysis and making advertiser attracted towards that certain network.  

answer; i believe that the correct answer is (decreased)

i want to say death; parole, probation, and fines are still being used all the time.