An error was discovered in the 2007 and 2008 ACS 1-year, 2005-2007 ACS 3-year, and 2006-2008 ACS 3-year Summary Files for Puerto Rico. The sequence number 146 that contains Detailed Table B98011 HOUSING UNIT COVERAGE RATE is not available for Puerto Rico and a comma should have been included to indicate the missing table. This error occurred in all three sets of data: estimate (e), margin of error (m) and standard error (s). These corrected Summary Files were released on December 28, 2009.