Definitions: (Number) Resident population for each age category.
July 1 Population Estimates.
Data Source: Data for 2010 through 2011 are Vintage 2011 population estimates. Each year the US Census Bureau revises their post-2010 estimates. Therefore, data presented here may differ from previously published estimates.
Data for 1990, 2000, and 2010 represent revised population estimates for July 1, 1990, July 1, 2000, and July1, 2010 - not actual Census counts from April 1, 1990, April 1, 2000, and April 1, 2010.
Data reflect July 1 population estimates.
Note: Maps use the natural break classification method, which reflects patterns
in the data by dividing the map into naturally occurring groups. Using statistical tools, this method
determines cut-off points for each group by identifying large gaps in data values.