This article describes how to go from a table with Row %...
...to a table that adds Row Comparisons (that is Column Comparisons, but for rows using the Row % statistic):
A table with rows and columns.
1. Select your table.
2. Go to Properties > RULES on the object inspector.
3. To apply the rule, select the Plus (+) > Significance Testing in Tables > Row Comparisons > OK.
Note, the results obtained from this rule are identical to those obtained if swapping the rows and columns and displaying Column Comparisons. The comparisons are shown to the right of the first statistic in each cell.