County Business Patterns: Are the summary total lines wrong? Why does totaling the detailed lines not equal the published totals?
For this reason, the same record could appear multiple times in a table, since it will appear at different summary levels. For example, an establishment listed in NAICS 316110 is also part of NAICS 31611, 3161, and the manufacturing sector total. Adding all of these detailed lines together would result in a total many times greater than the actual number.