2005-11-04 On 2005-03-14 new files were added to one
or more datasets. These files included additional setup files as well
as one or more of the following: SAS program, SAS transport, SPSS portable,
and Stata system files. The metadata record was revised 2005-11-04 to
reflect these additions.
2004-11-24 The data were converted from Card Image to Logical
Record Length format, SAS and SPSS data definition statements were
added, and the codebook was updated.