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National anthem protests were the top reason that NFL fans watched fewer games last season, according to a new survey released by J.D. Power.

The pollster said it asked more than 9,200 people who attended either one football, basketball or hockey game whether they tuned into fewer games and why. Twenty-six percent of those who watched fewer games last season said that national anthem protests, some of which were led by Colin Kaepernick, were the reason.

After that, 24 percent of those surveyed who said they watched fewer games said they did so either because of the league's off-the-field image issues with domestic violence or with game delays, including penalties.

Colin Kaepernick' protests last season during the national anthem has led to similar league-wide actions by players this year. Thearon W. Henderson/Getty Images

One in five (20 percent) listed excessive commercials and advertising as a reason, something the NFL is seeking to address by moving around traditional ad blocks.

Sixteen percent said it was because of their interest being replaced by the 2016 presidential election coverage.

Five percent said they watched fewer games because they got rid of cable.

J.D. Power noted that only 12 percent of the fans it surveyed said they watched fewer NFL games last season, with 27 percent of people saying they watched more and 62 percent saying they watched just as much as they had the season before.

The NFL did not immediately respond to a request for comment.

NFL game viewership on networks that broadcast games was down an average of 8 percent for the 2016 regular season versus the season before. Before the election (Nov. 8), games for the first nine weeks were down 14 percent compared to 2015. The final eight weeks saw only a drop of 1 percent compared to Weeks 10-17 in 2015.