NEW YORK — NBC’s Sunday Night Football finished as prime time TV’s most-viewed series for the ninth consecutive year when the 2019-20 season wrapped up Wednesday night.According to Nielsen, Sunday Night Football averaged 20.5 million viewers in 2019, which was a 5 percent increase over 2018. It also marked NBC’s best season since 2015.The most-viewed game was Sept. 29, when 24.37 million tuned in to see New Orleans beat Dallas. Sunday Night Football ended up having eight of the 20 most-watched programs in the calendar year 2019. Ten games ended up having 20 million viewers or more. Sunday Night Football ’s nine-year streak on top of the season-long ratings is the longest such streak, according to Nielsen. American Idol had the previous record at six. The Cosby Show and All in the Family each had five-year runs on top.