See also: Orders of magnitude
Conversion Calculator for Units of AREA (http://www.ex.ac.uk/cimt/dictunit/ccarea.htm)
... 18 to 24, 26.8% from 25 to 44, 27.7% from 45 to 64, and 19.9% who are 65 years of age or older. The median age is 43 years. For every 100 females there are 102.7 ...