There is a study that claims: over the last 5,000 years, about 10 billion Troy ounces of Gold has been mined. That's about 1.25 Troy Oz per Earth Citizen. World Population: 7.8 billion. But, another study says the available Gold Reserve is less than 2 billion or about a quarter (0.25) Troy Oz. per Person. So I am working on acquiring between 8 and 40 grams of Gold and praying that I never need it.

This Mexican Dos Peso is about is about 1.5 Grams or 0.0482 Troy Oz.
Thanks again for the message, welshstacker.