Hint: Missing values are easy to display in reports by using the options statement:
Options missing='0';
This will, until reset, display all missing values as 0 instead of . in output such as Procs Report or Print.
Another is to use a custom format. And example for your variable, since it is apparently a date value might look like:
proc format;
value mycustomdate
. = "N/A"
other = [date9.]
;
run;
and use the Mycustomdate format instead of the current one. Use your current date format in the [ ] brackets above if using something other than date9. You can display any text you want for the missing values though I would keep it short and relevant to the dates use. The brackets coupled with the keyword Other in Proc format means all values not in another value range are displayed with the format in the brackets.
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