The more things change, the more they stay the same. One item that has stayed constant during the last 10 years is the National Ready Mixed Concrete Association's (NRMCA) Industry Data Survey.

Each year, NRMCA surveys its members about their sales, costs, profits, and production. Allen Villere Partners assists in reporting the data. These fascinating tidbits of information include everything from how many miles each truck makes in a round trip, to delivery charges, to insurance, and to equipment depreciation. This data is reported by company size and by geographic region.

The result is a detailed look at an invigorating industry. We've provided a quick glimpse at how some of the numbers have changed over the last 10 years. Each year's report uses economic data from the previous year. For instance, the data from 2005 is included in the 2006 report.

The sources for the tables, charts, and graphs are NRMCA and Allen-Villere Partners.