The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
This chartbook is based on data from the National Survey of Children's
Health. Suggested citation: U.S. Department of Health and Human
Services, Health Resources and Services Administration, Maternal and
Child Health Bureau. The National Survey of Children's Health 2003. Rockville,
Maryland: U.S. Department of Health and Human Services, 2005.