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The trend is not the NFL’s friend.

Through six nationally-televised 2016 prime time games, the ratings have dropped in comparison to the 2015 equivalent in each and every slot.

Via SportsBusiness Daily, overnight ratings for the Week Two Sunday Night Football game pitting the Vikings against the Packers resulted in a drop of 16 percent in comparison to last year’s Week Two Seahawks-Packers game on Sunday night.

The NFL is not yet officially worried. Unofficially, however, the NFL surely is beginning to wonder what’s going on. One source with knowledge of the league’s thinking on matters of this nature recently suggested that, for now, the reason(s) for the decline aren’t known.

Regardless, the decline continues. The next test comes on Monday night, when the Eagles visit the Bears.