But that leapt to 20 last year - of which 12 were upheld.
From 2018 to the end of 2020 nationwide there 146 investigations and just over half were upheld.
Twelve people's employment was terminated as a result but the documents said this number included people who resigned during the process.
Police professional conduct director Jason Guthrie said service centre employees, made up of both constabulary and non-constabulary staff, were generally high volume users of the the NIA.
He said the number of staff employed in service centres has increased in the past three years and currently makes up 31 per cent of the total police workforce. He said that pushed up the number of database breaches.
The documents show nationwide 10 people were subject to disciplinary action.
Guthrie said most of the reported NIA use incidents were found to relate to low-level breaches and were successfully addressed through a remedial or performance management process.
Nationwide, 47 people had action taken that was flagged as "performance" and six as "remedial".
The Otago Daily Times reports nearly 2 million people have an NIA with an alert against their name.
- RNZ
