It's a fair cop guv.

The original text lacked the percentile bit and thus looked a bit wishy washy. Didn't think through all the ramifications of my partial rewrite.

Very surprised that you are unfamiliar with the term "tertiary qualifications". It's one of those that are are taken for granted and in everyday use here in Oz. We refer to primary (school years K-6 or 7), secondary (6 or 7-10 or 12) and tertiary (University, college etc) education. Thus tertiary qualifications are degrees, diplomas etc. Trade qualifications on the other hand, are typically commenced at the end of Year 10, in lieu of Year 11 and 12.

stales