Frequencies for first 10,000 rows of vitalsd variable in nhamcsed2014 dataset :

Were vitals |
   taken at |
 discharge? |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |        316        3.16        3.16
        Yes |      3,668       36.68       39.84
         No |      6,016       60.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017