particular Asian nation
It would be better for your LR score ilt you use the phrase " in no particular Asian nation " instead. When you say "in particular" that connotes the naming of a nation, which you cannot do since it was not provided. Saying "no particular" avoids the need to name a specific country.
forty-year period.
This reference is too general. It can refer to any year coverage. Refer to the specific years to help clearly inform the reader.
It is patently obvious
This is a redundancy since patently already means obviously. Do not repeat your word usage. Your synonym usage did that in this sentence.
period during 1980 and 2000
A period refers to successive, not selective years. This should say :
... period ranging from 1980 to 2000...to clearly refer to a time progression. Improper sentence formation blurrs your info clarity.
Specific areas for review and improvement:
1. Grammar range and sentence structuring
2. Vocabulary and synonym usage
Your analysis is acceptable but could be shorter. A single image reference should be no more than 7 paragraphs long.
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