แม่แบบ:Certification Table Entry/Sales/NorwegianPeriod/doc

This helper template calculates periods for Norwegian certifications. For albums:

• Before July 2002: [1] and [2]
• Before 2008: [3]
• Before 2015: [4] and [5]
• Before 2018: [6]
• From 2018: [7]

It returns:

Before July 2002	Before 2008	Before 2015	Before 2018	From 2018
1	2	3	4	5

Returns 0 if the data provided is not sufficient.