User:Muhandes/Certification Table Entry/Sales/NewZealandPeriod/doc
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This helper template calculates periods for New Zealand single certifications, as stated in the following sources:
- According to Scapolo, Dean (2007). The Complete New Zealand Music Charts: 1966 – 2006. Wellington: Maurienne House. p. 7. ISBN 978-1877443-00-8. the levels changed in 1989.
- The 7 May 2007 chart and 4 June 2007 chart demonstrate a change near June 2007.
- According to this and the very bottom of this, from June 2016, the NZ singles have 15,000 for Gold and 30,000 for Platinum now.
It returns:
| Before June 1989 | Before June 2007 | Before June 2016 | From June 2016 |
|---|---|---|---|
| 1 | 2 | 3 | 4 |
Returns 0 if the data provided is not sufficient.