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

Lab Srvc Cd |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,221       82.21       82.21
          0 |      1,223       12.23       94.44
          1 |         73        0.73       95.17
          2 |        449        4.49       99.66
          3 |         34        0.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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