Wait box office mojo has a ticket inflation adjustment
Rank	Title (click to view)	Studio	Adjusted Gross	Unadjusted Gross	Release
1	Barbershop	MGM	$113,463,300	$75,782,105	9/13/02
2	Barbershop 2: Back in Business	MGM	$91,218,700	$65,111,277	2/6/04
3	Barbershop: The Next Cut	WB	$7,040,000	$7,040,000	4/15/16
So yeah it's kind of bigger than a slight decline. Perhaps a summer release would have been smarter.

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