Population frame The 2008 Agricultural Production Survey includes all units identified on Statistics New Zealand's Business Frame as having agricultural activity. The Business Frame is a list of businesses in New Zealand, based on their registration for goods and services tax (GST) with Inland Revenue. In the case of agriculture, the Business Frame includes: · those units registered for GST (and filing a non-zero GST return) that have indicated involvement in agricultural activity (as defined above) · those businesses with more than $200,000 of GST sales or purchases, or that are an employer, whose main activity is not agriculture but that have indicated some secondary agricultural activity. The compulsory registration level for GST is $40,000, so there is a partial and unquantifiable coverage of units below this level. Responses from farmers and foresters in the 2008 Agricultural Production Survey have resulted in an estimated eligible population of 60,600 enterprises.