First thing you attached two files. Import which? The PDF describes the text file and you would use that to write a data step to read the text file. Import will almost certainly get stuff wrong.
Starting on Page 8 of the PDF and you see the first column with "Position" as the header shows that this is fixed column file. That means specific variables occupy specify column(s). Import will never get that correct as it expects something in the file to tell where values start/end. Typically tab or some other character if the file is text. In this case there is no such delimiter between variables.
I would strongly suggest searching the source website as CDC quite often has a section with SAS code to read the files and often instructions for the various versions. The documentation starting at page 8 runs more than 30 pages of file description. I have used such to write code to read files. It is part of my paid job. I am not going to that much effort on this forum where I volunteer.
Here is how to apply the information starting at page 8 to write a data step to read the file after you unzip the file. Unzip the file before running following code and use the path to the unzipped file and what ever the name of the file may be on the Infile statement. The $ means you are reading character values.
data datasetname;
infile "<path>\filename.txt" truncover lrecl=32000;
input
filler $ 1-8
dob_yy 9-12
dob_mm 13-14
filler $ 15-18
dob_tt 19-22
;
drop filler;
run;
The "filler" actually are not needed in the code but I included for continuity to follow the text in the document. You would only have one variable by that name in the output and since it is "blank" dropping it makes sense.
