Frequencies for first 10,000 rows of othther variable in nhamcsopd1997 dataset :

  all other |
therapeutic |
/preventive |
   services |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,657       86.57       86.57
          1 |      1,343       13.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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