Frequencies for first 10,000 rows of securchck variable in namcs2014 dataset :

Has your practice |
          made an |
assessment of the |
  potential risks |
and vulnerability |
               of |      Freq.     Percent        Cum.
------------------+-----------------------------------
          Unknown |        910        9.10        9.10
   Not applicable |      2,039       20.39       29.49
              Yes |      6,261       62.61       92.10
               No |        790        7.90      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017