I am not sure how many long forms were actually mailed but it is readily available information. I was just finding out if this was a fact and it appears to be. I also am guessing Trump wanted it on the short form. Since the question has been on the census off and on for well over 150 years I do not see it as unreasonable. Last year when I was doing my ancestry.com thing I was looking at 19th century census records and that was in the data for some of the records.