Sorry mate I thought you were after past data.
The bloke you should be contacting is partypooper, he wrote in one of his forum replys:
" partypooper ", I can't help you with WA Zipform, but here are a few facts from my Zipform monitoring over the past three years"
You can also search for "zipform" on this forum, as well as all of partypooper's postings.
Hope it helps,
Sorry!