Frequencies for first 10,000 rows of lab_srvc_cd variable in pos2014 dataset :

  Services: |
 Laboratory |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,351       83.51       83.51
          0 |      1,097       10.97       94.48
          1 |         70        0.70       95.18
          2 |        451        4.51       99.69
          3 |         31        0.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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