To provide reliable estimates, a minimum of 100 survey interviews is necessary for results to be displayed. A number of counties do not meet this threshold for single-year estimates, and multiple years of data will be needed to produce reliable estimates for those counties. To use multiple years of data, highlight the desired years in the drop-down box on the query page.
Please note that the All Counties Module also provides county-specific BRFS estimates, using three-year aggregations of data and county-specific weighting. See Which Module Should I Use? to make an informed decision about the best module for your needs.