While I can't be assed looking up the figures I would hazard a guess that the period around 92-97 was pretty poor. When you give guys like Blair Hartland and Blair Pocock opening spots things are not great
You're right, that was a pretty dark time for NZ cricket, especially from about 1993-1995, when we had the fearsome attack led by Richarf de Gruin and Murphy Sua'a...
lest ye forget Robert Kennedy...