Iron Mountain conducted a survey of the state of shredding in business today. I am not sure of the methodology but they did provide one great statistic:

74 percent of respondents say they were familiar with the federal requirements for shredding. However, only 30 percent of the respondents were aware of the Fair and Accurate Credit Transactions Act (FACTA). This is the most comprehensive of all the federal laws that cover the proper destruction on personal information.