Colonized by Spain, the land that is now New Mexico became U.S. territory as part oft he Gadsen Purchase in 1853, though New Mexico did not become a U.S. state until 1912.
Average incomes in Florida are $75,000. Average salaries in Michigan and Pennsylvania are $73,000 per annual. By far most paid US city is San Francisco, with average salary about $100,000 per annual. The second largest salaries are in New York City, Washington DC, and Boston, all from $87,000 to $88,000 per annual.
Once they have the total wage bill for each country, they add them all together and divide by the total number of earners in the world. That gives you the answer-the world's average salary is $1,480 (Â£928) a month, which is just less than $18,000 (Â£11,291) a year. But these dollars are not normal US dollars.