There are workers whose job is to service or work in rooms with phocopiers who have occupational asthma. The precise cause awaits identification. ld phocoiers produced ozone which was thought to be a cause of sick building syndrome, but without much evidence.
The Oasys Audit scheme started midway through 2010 and collects agents typed in through the Oasys program. The years before 2010 show old data entered during 2010 or later and are likely to have many fewer notifications. We expect Oasys to become more widely adopted as time goes by so increasing notifications does not necessarily mean an increasing problem.