"Harvard Math Teacher!"
...71/7 billion multiplied by 100 = 40%. Including different local dialects and other languages in the entire Indian subcontinent and/or Muslim majority regions, such as Somalia, Lebanon, Turkey, Azarbaijan, Malaysia, Nepal, Sylheti, Chittagongian etc increases the coverage to 45%. In 2001, I acquired a Certificate of Proficiency in Information Systems...
10+ subjects, including economics