The 2009 social report has some interesting figures of women's representation in the house:
The majority of women elected to Parliament in 2008 were list MPs (54 per cent). List MPs have outnumbered electorate MPs among women elected to Parliament in four of the last five general elections.
New Zealand has considerably higher female representation in national government than Australia (27 per cent), Canada (22 per cent), the United Kingdom (20 per cent) and the United States (17 per cent). Interestingly all these countries have non-proportional electoral systems.