RESTAURANT SALES Year-over-year change, weekly Graph tracks sales from December to May.
The firm tracks sales to customers in most, but not all, American retail stores.
IRI tracks sales at some retailers like Bed Bath & Beyond, but not at others, like Costco.
It tracks sales at supermarkets, drug stores, gas stations and mass marketers except for Wal-Mart.
(Information Resources tracks sales in supermarkets, drug stores and mass merchandisers excluding Wal-Mart).
Hybrid 8.8%, $408 Graph tracks sales of bicycles* from 1992 to 2001.
Markit's composite output index — which tracks sales, employment, inventory and prices — rose to 51.7 in August from 50.5 in July.
New autos sold at an annual rate of 9.86 million units, according to Autodata, a company that tracks sales.
Same-store sales — a key measure that tracks sales in stores open at least a year — dropped 9.2percentt.
Software sales were up 63percentt in March compared with March 2007, according to NPD Group, which tracks sales.
"In the last quarter of 2010, we saw a real improvement," said Jesse Toprak, vice president for industry trends and insight at TrueCar.com, which tracks sales and pricing.
