The Seattle Seahawks have had the NFL’s biggest jump in local TV viewership — a whopping 77 percent — over the past two years, according to a new report.

Back in 2011, 21.8 percent of televisions in the Seahawks’ home market were tuned in to the team’s average regular-season game. In 2012, that percentage grew to 28.3 as the Seahawks surged to national prominence. And this football season, in 2013, Hawks games drew 38.6 percent of local TV watchers while they were being telecast, according to Sports Business Daily.

That makes for a 37 percent increase from 2012 to 2013, and a 77 percent increase from 2011 to 2013.

Only the Chiefs, who went from a 2-14 record in 2012 to 11-5 this season, experienced a greater jump in local year-over-year TV viewership. Yet over the past two years, no NFL market held a candle to the growth in the Seattle-Tacoma market, according to the SBD report.

At 38.6 percent, the Seahawks had the league’s fifth-highest average TV rating in their local market this season. According to Sports Business Daily’s report Tuesday, only the New Orleans Saints (52.0 percent), Denver Broncos (43.5), Green Bay Packers (42.9) and Kansas City Chiefs (42.9) had higher ratings than Seattle.

The 12th Man may be happy to know that the Pittsburgh Steelers had the second-largest drop (14 percent) in TV ratings this season, trailing only the Atlanta Falcons (22 percent). Pittsburgh remained in sixth place overall with an average rating of 38.2 in 2013 — just behind Seattle.

To be clear, we’re talking about the average percentage of televisions in each market that were tuned to regular-season NFL games while they were being broadcast. Overall, this season the NFL experienced 4 percent growth over 2012, with an average rating of 28.5 percent.

Visit seattlepi.com for more Seattle news. Contact Nick Eaton at nickeaton@seattlepi.com or @njeaton.