Frequencies for first 10,000 rows of cl_srvc_cd variable in pos2013 dataset :

  Services: |
   Clinical |
 Laboratory |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,601       86.01       86.01
          0 |         57        0.57       86.58
          1 |        886        8.86       95.44
          2 |        269        2.69       98.13
          3 |        187        1.87      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016