Since its formation the service has received a steadily increasing number of calls.
Over 50% of the case follow-up questionnaires returned by enquirers are suitable
for incorporation into the service's database, which is currently increasing by around
1000 case reports each year. All enquiries are analysed as to substance myolved,
outcome and animal species. Figures for individual years are published byVPIS; but
as the service is still relatively new a broad overview of the early years is given,
without detailed analysis of yearly fluctuations.