I am looking at the Site Usage reports for a site collection that has been in existence for about 6 months now. The other sections on the report all contain data, but the Average time spent per user report is blank. It is blank for both the 7 day and 30 day intervals. Also, if I sort the Popular content reports on time spent, they are blank (sorting by unique viewers and visits show data). Is there a configuration setting that needs to be made to show this data, or is the report just broken? The site collection is a classic team site if that makes any difference.