Hello, We have a project in Sri Lanka where we try to attempt this credit via percentile rainfall event option. However we find difficulty of getting continuous 30 year rainfall data. There are some months that the rainfall data are not available. So in that case can we still calculate the percentile storm event using the available data or attempt to consider about extra couple of years (say 32 years instead of 30 years) in order to compensate for the missing months of data?

Thank you.