Don't forget to fill out your Census today - if you haven't already.

Everyone staying in New Zealand tonight is required by law to complete the form.

The Census helps create a clear picture of community needs so government agencies, councils, iwi, community groups and businesses can respond.

However, Massey University's Emeritus Paul Spoonley told Kate Hawkesby there are some groups that aren't willing to give up any information. 

He says officials are working to convince them otherwise. 

The collection period has been extended for cyclone-impacted areas until June first.

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