The data are available in two formats: in SAS data sets or in CSV (comma-separated values) format. SAS is a statistical analysis software package, and CSV files can be read into a large number of software programs such as Excel or Access. Note that in the CSV files, the variable name is the first row in the file. The files are named the same and are in the same format as they were in the 2005-2009 5-Year CVAP release, except for the addition of an estimate of the number of citizens and its margin of error for tracts and block groups.