Template:Certification Table Entry/Sales/GreekPeriod
This helper template calculates periods for Greek certifications, as stated in IFPI Greece#Certifications
It returns:
| Up to 10/1990 | 11/1990–1997 | 1997–11/2002 | 12/2002–2005 | 2006–08/2009 | 09/2009–2020 | 2021 onwards |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
Returns 0 if the data provided is not sufficient.