Here is a quote taken from page 4 of the 2007 NZ Coin and Banknote catalogue (page 4):
IMPORTANT MINTAGE INFORMATION
After some lobbying efforts, selected figures have been released for decimal collector coins from 1993 through to 2005 showing those issues where the total number ordered from the applicable mint was LOWER than the the mintage limit set for New Zealand. It is unlikely that further coins will be minted for these issues. Besides each of the affected issues, the maximum mintage for New Zealand is given, followed by the actual number ordered in brackets. These numbers reveal significant information about how many of each issue actually exist and should be of wide interest to collectors and dealers alike - some of them very low indeed.Also, here is a page from the RAM report for the 2004 issue: (scroll down to page 6)
http://www.ramint.gov.au/about_ram/downloads/AnnualReport2005Supplement.pdf