Frequencies for first 10,000 rows of lab_srvc_cd variable in pos2015 dataset :

  Services: |
 Laboratory |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,443       84.43       84.43
          0 |      1,038       10.38       94.81
          1 |         64        0.64       95.45
          2 |        420        4.20       99.65
          3 |         35        0.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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