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

          Does practice have |
    computerized capability: |
   recording patient smoking |
                  status - R |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                     Unknown |        159        1.59        1.59
                         Yes |      6,494       64.94       66.53
                          No |      3,051       30.51       97.04
Yes, but turned off/not used |        296        2.96      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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