you can use manual running totals
create a formula to use in the calculate
if id >0 then 1 else 0
RESET
The reset formula is placed in a group header report header to reset the summary to zero for each unique record it groups by.
whileprintingrecords;
Numbervar X := 0;
CALCULATION
The calculation is placed adjacent to the field or formula that is being calculated.
(if there are duplicate values; create a group on the field that is being calculated on. If there are not duplicate records, the detail section is used.
whileprintingrecords;
Numbervar X := x + {field}; ( or formula)
DISPLAY
The display is the sum of what is being calculated. This is placed in a group, page or report footer. (generally placed in the group footer of the group header where the reset is placed.)
whileprintingrecords;
Numbervar X;
X