The information is obtained from state and federal agencies as well as private business. These sections represent the type of information most frequently requested by a broad range of users. It would be impossible to compile and publish the Data Book without the cooperation of the contributing agencies. Therefore, we thank those agencies and their research staff, professional and clerical. Agency names, addresses, general information telephone numbers, and reference are listed in the Contributing Agencies section.
Every effort is made to ensure the accuracy of the data presented in the Data Book.
Because the Data Book is published every two years, much of the material is subject to frequent updates and changes and these data should not be cited as the most recent official agency information. Many data series published in the Data Book are available in separate publications released by the contributing agencies. These source documents generally provide updated data on a more frequent and detailed basis than the Data Book. The source documents also provide data definitions and user information not included in the Data Book due to lack of space. Please contact the contributing agency for additional data, explanations, or updated information.