1. 1. Calculated based on 2004 National Survey on Drug Use and Health data. Substance Abuse and Mental Health Services Administration, Department of Health and Human Services. Available at: http://www.oas.samhsa.gov/nhsda.htm. Accessed April 25, 2008.
2. 2. Substance Abuse and Mental Health Services Administration, Department of Health and Human Services, Results from the 2004 National Survey on Drug Use and Health: Detailed Tables. Available at: http://www.oas.samhsa.gov/NSDUH/2k4nsduh/2k4tabs/2k4tabs.pdf. Accessed April 25, 2008.
3. 3. U.S. Department of Health and Human Services. Reducing the health consequences of smoking: 25 years of progress. A report of the Surgeon General. US Department of Health and Human Services, Public Health Service, Centers for Disease Control, Center for Chronic Disease Prevention and Health Promotion, Office on Smoking and Health. DHHS Publication No. (CDC) 89-8411. 1989. Available at: http://profiles.nlm.nih.gov/NN/B/B/X/S/. Accessed April 25, 2008.
4. 4. Centers for Disease Control and Prevention. Sustaining state programs for tobacco control: Data highlights 2004. Available at: http://www.cdc.gov/tobacco/data_statistics/state_data/data_highlights/00_pdfs/DataHighlights.pdf. Accessed April 25, 2008.