PTCstatus is a snapshot in time of licenses in use. If you want a historical summary of useage, you need to purchase a package from the license vendor, which isn't cheap. There is a freeware license tracking program that a PTC customer has put together. I would have to dig deep for anymore information on either one.
I used to have a program that ran ptcstatus every 10 minutes or so and dissected the response into a file that could be read into Excel. This was under HP-UX and used UNIX utility software, but the same could be done directly with Excel and VBA.
take a look at this document wrote by David Haigh.