Template:Nationality television series debuts or endings by decade category/doc

Creates a category of the form "nationality television series debuts by decade", where nationality is a valid nationality.

The template detects whether it is being used on a "debuts" or "endings" category, and adjusts its output to suit.

e.g.
 * Category:Danish television series debuts by decade ✅
 * Category:Irish television series endings by decade ✅

But not


 * Category:Colombian television series debuts ❌
 * Category:Mexican television series endings by year ❌
 * Category:2011 Israeli television series debuts ❌
 * Category:1990s Canadian television series endings ❌

Usage
No parameters needed

Errors
If the template is used on an invalid page, an error message is generated and the page is categorised in:
 * Category: (population: )

Errors include:


 * The page is not in the category namespace
 * The page's title does not take the form "nationality television series debuts by decade" or "nationality television series endings by decade"
 * The value of "nationality" does not correspond to a country name.  The conversion is made using GetCountryNameFromAdjective, so the problem may be a glitch in that template's lookup table