Row Number Assigned Via RunningValue But Without Grouping

I have a report where certain columns have values that get repeated, but the client has a rigid requirement for not wanting these columns as groups in the reports (other programs and exports doing specific tasks with those values). In these reports, the "hide duplicates" value is checked, so as to give an aesthetic sense of grouping.

The data for the report, in raw form is:








Value 1
A

Value 1
B

Value 1
C

Value 2
D

Value 2
E

Value 2
F

Value 3
G

Value 3
Hetc...

In its aesthetic form, it is:








Value 1
A


B


C

Value 2
D


E


F

Value 3
G


H

My question is, how can I use RunningValue() to give me the following row numbers based upon those repeated values acting as grouping, since I'm not using formal grouping in the report design?











Value 1
1
A


2
B


3
C

Value 2
1
D


2
E


3
F

Value 3
1
G


2
H



Thanks for any input!