Export developments in Asian countries in light of different religions (Excel data)

Need to complete a empirical analysis with appropriate data. One should apply tools i.e. correlation and regression analysis.

Data sources e.g. UNCTADstat, OECD Statistics, DataBank | The World Bank

Questions:
– Where can I get the data regarding relegion from the last ten years?
– How do I merge the different data in a efficent way?
– Is the data I have collected sufficient? (raw_data_from_world development_indicators file)

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