Frequencies for first 10,000 rows of eimmregr variable in namcs2012 dataset :

          Does practice have |
    computerized capability: |
     electronic reporting to |
                immunization |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                     Unknown |        932        9.32        9.32
                         Yes |      2,932       29.32       38.64
                          No |      5,445       54.45       93.09
Yes, but turned off/not used |        691        6.91      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016