Frequencies for first 10,000 rows of cl_srvc_cd variable in pos2011 dataset :

   Services |
  Provided: |
   Clinical |
 Laboratory |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,614       86.14       86.14
          0 |         63        0.63       86.77
          1 |        909        9.09       95.86
          2 |        265        2.65       98.51
          3 |        149        1.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Apr 2019