I will turn to Stephen in a minute for cost. He may not have those figures readily at hand, in which case we will have to get back to you.
We absolutely agree that a national tracking system is an important aspect of being able to monitor and do proper risk assessment on plant health issues.
I can see Stephen perhaps doesn't have that information specifically on cost. We will get back to you on that.
I will ask Paul, though, to speak a little bit about tracking, and how, in the absence of a national tracking system, we have tried to manage risk.