When extracting data in ASCII format, the "comma" option in the "Delimiter" box
under "Formatting Options" in fact produces a Tab-delimited file. To properly read this
file in SAS, the following options should be specifed in the INFILE statement:
firstobs=2 delimiter = '09'x
"firstobs=2" skips the first line, which just contains the variable names, while
"delimiter='09'x" indicates that the file is tab-delimited