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Data cited at: https://cameroon.opendataforafrica.org/vszafdc Demographic Statistics of African countries  

Exports by Country for Senegal

International Merchandise Trade Statistics

International Travel and Tourism of Mauritius, by Age Group

Data cited at:  "Annual Survey of Mining Companies: 2021"@ Fraser Institute   The Fraser Institute Annual Survey of Mining Companies was sent to approximately 4,100 exploration, development, and other mining-related companies around the world. Several mining publications and associations also helped publicize the survey. The survey, conducted from October 9, 2012, to January 6, 2013, represents responses from 742 of those companies. The companies participating in the survey reported exploration spending of US$6.2 billion in 2012 and US$ 5.4 billion in 2011.