Overall, the study is interesting. However, the authors should pay attention to the following: 1. The time frame for the data used in this study is 1985-2017. Is there no data for 2018&2019? This will make the result to be current and valid. 2. The statement of problem or motivation to the study is missing. 3. Literature Review- Lack of critical review, but rather summarises the articles. The writing nearly has no connection to the study's specific focus of attention. 4. The author should add suggestion for further study in the Conclusion section.

The article is okay for publication. I am satisfied with all comments I raised in the previous review.