(1) Throughout this report, national or U.S. totals or averages include specialty substance abuse treatment providers reporting from the 50 States plus the District of Columbia, Puerto Rico, American Samoa, the Federated States of Micronesia, Guam, the Pacific Trust Territories, and the Virgin Islands, as well as Federal agencies and Native American tribal governments. However, comparisons highlighted in the text are limited to the 50 States. All States and jurisdictions are represented in the detailed tables (Appendix 7).