Catalog production in 2004 increased by one billion from the previous year—and in the past ten years, catalog production has increased by over 40%. (Source: The Direct Marketing Association 2005 Statistical Fact Book)
In 2004, the catalog industry mailed over 18 billion catalogs — 64 for every man, woman and child in the U.S. (Source: The Direct Marketing Association 2005 Statistical Fact Book; 2001 U.S. Census Data)
The average response rate for catalogs is 2.52%. (Source: Catalog Age Weekly, 10/16/03)
ForestEthics.com has more information, including a naughty/nice list. See also: consumerist.com.