Measured values (as opposed to planned values) can be exported as a data table from the "Execute" tab in measure mode. The exported data table will contain the same attributes present in a normal data export, but only for a selected group of runs. More about run groups.
To export values for a group: click to the execute tab and click the run group drop down in the bottom panel of measure mode:
Note: A new tab opens to download the requested file - make sure your browser does not block the tab from opening or the file from downloading.