Please answer the following question: Given the following passage "Seasonal rankings (based on average total viewers per episode) of American Idol. It holds the distinction of having the longest winning streak in the Nielsen annual television ratings; it became the highest-rated of all television programs in the United States overall for an unprecedented seven consecutive years, or eight consecutive (and total) years when either its performance or result show was ranked number one overall.", answer the following question. Note that the answer is present within the text. Question: Where can you find data on the popularity of different shows?
A:
Nielsen annual television ratings