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

          Does practice have |
    computerized capability: |
identifying patients due for |
                     prevent |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                     Unknown |        259        2.59        2.59
                         Yes |      6,384       63.84       66.43
                          No |      2,671       26.71       93.14
Yes, but turned off/not used |        686        6.86      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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