The graph depicts the Restaurant performance index scores of the U.S. restaurant industry in 2011. In March 2011, the index score was 101.
The Restaurant industry performance index is a statistical barometer measuring the overall health of the U.S. restaurant industry. The index is based on the results of the monthly Restaurant Industry Tracking Survey composed of a variety of indicators including sales, traffic, labor and capital expenditures.
A value above 100 signals a period of expansion while a value below 100 signals a period of contraction.