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

Electromyog |
  ram (EMG) |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,981       99.81       99.81
        Yes |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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