A number of U.S. Federal Agency Statistics related to Aging-Related Issues.  The site is a bit dated looking, but the facts are up-to-date and based on census, bureau of labor and other large government agencies.

The full list of member agencies is:

• Administration on Aging
• Agency for Healthcare Research and Quality
• Bureau of Labor Statistics
• Census Bureau
• Center for Medicare & Medicaid Service
• Department of Housing & Urban Development
• Department of Veterans Affairs
• Employee Benefits Security Administration
• Environmental Protection Agency
• National Center for Health Statistics
• National Institute on Aging
• Office of the Assistant Secretary for Planning & Evaluation, HHS
• Office of Management & Budget
• Social Security Administration
• Substance Abuse & Mental Health Services Administration