Per the Admin Guide : LICENSE_ARCHIVE_PERIOD
"The time interval in days during which license usage is archived. License usage information before this period is removed from the archive.
By default, the value is set to 365 days. If you set the value to -1, the license archive period is unlimited."
Of course, this will take effect after you change the value and past data is definitively lost (unless you can retrieve them from database backups).