LOS ANGELES — “The Possession” occupied the top spot at a nearly comatose box office.

The fright film with Kyra Sedgwick and Jeffrey Dean Morgan playing the parents of a girl possessed by a demon earned $9.5 million in its second outing, the lowest grossing weekend for the box office this year and one of the worst weekends at the box office in a decade. It marked the first time since 2008 that no film managed to crack the $10 million mark.

The weekend after Labor Day is typically the slowest of the year, but this weekend’s grosses were down 20 percent over last year when “Contagion” opened in first place with $22.4 million. Total box office revenues are estimated at $67 million, which would make this the worst weekend at the box office since the weekend after 9/11 when revenues were $59.7 million.

Estimated weekend ticket sales at U.S. and Canadian theaters, according to Hollywood.com, were:

1. “The Possession,” $9.5 million

2. “Lawless,” $6 million

3. “The Words,” $5 million

4. “The Expendables 2,” $4.7 million

5. “The Bourne Legacy,” $4 million

6. “ParaNorman,” $3.8 million

7. “The Odd Life of Timothy Green,” $3.6 million

8. “The Campaign,” $3.5 million

9. “The Dark Knight Rises,” $3.3 million

10. “2016: Obama’s America,” $3.3 million.