relative value function

Hello,

I need to compute the difference between the current year and previous year of data.

I am using a vertical table, with a break on 2 dimensions ( Year, and Division).

I am able to get the correct result by using the Relative Value function as :

=[Total Members] - RelativeValue([Total Members];([Year]);-1)

However, if I add an additional column to the table that I need to use to sort by, then the calculation doesn't work. I know the Relative Value function takes the sort order into consideration but is there a work around this?

Thanks for any help!

Maria