To help compare sizes of different surface areas, here is a list of areas of the order of 1017 square metres, i.e. between 100 billion km2 and 1 trillion km2. See alsoareas of other orders of magnitude.
... 29.5% of all households are made up of individuals and 4.9% have someone living alone who is 65 years of age or older. The average household size is 2.26 and the average ...