The Kentucky Derby broadcast on NBC on Saturday posted a 9.1 overnight rating and a 21 share, according to the television network, with both figures representing significant declines from last year.
The 9.1 overnight rating was a 13 percent decline from the 10.5 rating posted last year, while the 21 share was an 8.7 percent decline from the 23 share posted last year. While the overnight rating is a numerical measure of the number of people watching a broadcast, share is a measure of the percentage of televisions in use that are tuned into a broadcast.