The Green Bay Packers’ touchdown production inside the 20-yard line has been so good for so long under coach Mike McCarthy that a drop-off during the first four games this season isn’t causing the team much concern.

The Packers have slipped from No. 3 in the NFL last season in red-zone touchdown production (68.1 percent) to tied for No. 13 this year (56.3 percent).

“We’re not going to change our approach the way we train our red zone” McCarthy said Wednesday. “I’ve had to answer these questions before. It’s been four weeks. It’s not quite where we want it to be but we have confidence it’s going to get there.”

The Packers settled for five Mason Crosby field goals in a 22-9 victory over Detroit on Sunday including two trips inside the 20.

When asked if there was a certain red-zone success rate the Packers needed to hit Packers quarterback Aaron Rodgers replied: “There is. It’s 100 percent.”

Since 2008 when Rodgers became the starting quarterback the Packers have posted the best red-zone touchdown efficiency in the NFL (61.3 percent). They have ranked in the top 10 in each of the past five seasons and four of the Packers’ best red-zone seasons since 1995 have come under McCarthy.

That’s why no one on offense is panicking because the Packers have scored touchdowns on just nine of their 16 trips inside the 20 this season.

“We just have got to continue to grind at it get better at it and make sure we make the most of our opportunities” receiver Jordy Nelson said.