"Stats NZ can combine information from farmers with export data to show that the average dairy cow earned $2450 in exports for New Zealand in 2016. This compares with $1550 for the average beef animal, $450 for deer, and $200 for sheep," says Mr Pitts.
In horticulture, the average hectare of kiwifruit earned $77,000 in exports for New Zealand in 2014. The average hectare of apples earned $64,000 and wine grapes earned $39,000.
The census of all farmers is held every five years. In the years between each census, Stats NZ surveys farmers from just some sectors.
"The census can be done online, which was the most popular way for farmers to complete their questionnaire last year," says Mr Pitts.
The compulsory survey is collected jointly by Stats NZ and the Ministry for Primary Industries for research and statistical purposes. Both agencies keep farmers' individual information confidential.
Stats NZ sometimes combines data to increase value to decision-makers and researchers.
Research findings are confidentialised so individuals or businesses cannot be identified.