A New Zealand Customs Service spokeswoman said the number of searches conducted each year depended on different priorities and focuses. In 2011 there was a spike in searches because of Operation League, which targeted objectionable material being imported into New Zealand.
Cigarettes were seized when they were over the duty-free limit, which is 50 cigarettes or 50g of cigars or tobacco products, and the passengers failed to declare them on their Passenger Arrival Card.
Computer hard drives were seized because they contained objectionable material, which were prohibited imports.
The spokeswoman said the number of searches sometimes did not match the number of different days on which items were seized because Customs often seized goods some time after the initial detainment.
"This is done so that a more thorough enquiry or investigation can be conducted, which better determines whether offences have been committed, and if they have been they can be summarised accurately and comprehensively."