Frequencies for first 10,000 rows of nodiagsc variable in nhamcsed1993 dataset :

diagnostic/ |
  screening |
 services - |
       none |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,576       85.76       85.76
          1 |      1,424       14.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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