Frequencies for first 10,000 rows of lab_srvc_cd variable in pos2017 dataset :

  Services: |
 Laboratory |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,564       85.64       85.64
          0 |        918        9.18       94.82
          1 |         67        0.67       95.49
          2 |        378        3.78       99.27
          3 |         73        0.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 9 Jan 2018