Calculations - Estimate of Potential Apple Customers in Various Cities

The following charts calculate the theoretical number of Apple store "buying" customers within a city or region, based on an age group (15-64), ability to read, and the country's "top income" percentage, which is determined (by me) from the country gross national income (GNI), which in turn is a measure of a person's ability to afford a $400 or $2,000 electronic device.

In particular, it compares the cities of Quito (Ecudor), Sydney (Australia) and Chicago. Notice that the total number of potential customers increases, along with the percentage of the city's population.

Also see the Global IT report for additional comparisons of a country's network readiness.

Quito population (CIA World Factbook) 1,200,000
15-64 year olds (Improdir) 60%
Literacy rate, 15 yrs & older (HDR) 91.0%
Top income 20%
1,200,000 * (60%) * (91%) x (20%) = 131,040

10.9% of total city population

Sydney population 3,900,000
15-64 year olds 66.8%
Literacy rate, 15 yrs & older 100.0%
Top income 60%
3,900,000 * (66%) * (100%) x (60%) = 1,563,120

40.0% of total population

Chicago population 2,896,000
15-64 year olds 64%
Literacy rate, 15 yrs & older 100.0%
Top income 70%
2,896,000 * (64%) * (100%) x (70%) = 1,297,408

44% of total population