If you have the [<node name>] Dimension
already on a view, you may want to try
INDEX() / ( SIZE() + 1 )
Also please take the extract of your data and hide all unused field, then it will be much faster.
I've already tried this method but it didn't work as expected. However, after your post I tried it again and configured it better and it seems to work fine. Thanks!
Michal, you're welcome.