The Mets announced a final-game attendance of 30,849. That makes the season total: 2,559,738.
Because there were two single-admission doubleheaders and technically 79 home dates, the average attendance was 32,402.
Depite 92 losses in 2009, their inaugural season at Citi Field, the Mets announced a total attendance of 3,168,571. That's an average crowd of 39,118 for each of 81 home dates.
So the final decline in average attendance: 17.2 percent.
Excluding seasons in which the Mets moved into new ballparks -- because different capacities make it unfair to compare -- this year's drop is the seventh-largest single fall in franchise history.