Census 2010 - Business Dynamics Statistics (BDS) Information
http://www.ces.census.gov/index.php/bds/bds_home

The following is a quick summary from the Census website:

New BDS tool gives insights into the dynamics of a changing economy

• Unique information on firm age and firm size
• Public-use data

BDS tables show key economic data:

• Number of Establishments
• Establishment Openings/Closings
• Employment
• Job Creation/Job Destruction
• Job Expansions/Job Contractions

The BDS series provides:

• Annual data 1976-2009
• Firm age and firm size
• State
• Standard Industrial Classification sectors
• Entire economy

Aurora is a Home Rule Municipality spanning Arapahoe, Adams, and Douglas counties in Colorado.
The city is the third most populous city in the state of Colorado and the 59th most populous city in the United States.
Denver and Aurora are the principal cities of the Denver - Aurora - Broomfield, CO Metropolitan Statistical Area:

· City Population (2010 Census): 325,078
· Percentage of Population within each County:
·  Arapahoe County — 85.84%
·  Adams County — 14.11%
·  Douglas County — .05%
· 59th Largest City in US (Based on Population)
· Annual Growth Rate (1990—2010): 1.64%
· Median Age (2010): 33.2 
· Estimated Population by Single Race Classification   (% of Population in 2010):
· White:     61.1%
· Black:     15.7%
· Asian:     4.9%
· Other:     18.3%
· Identified Hispanic/Latino Population (2010): 28.7%

Thanks to Donna Vicars-Benjamin, Senior Planner II, Planning and Development Services Department, city of Aurora.