Frequencies for first 10,000 rows of prov6230 variable in pos2006 dataset :

   srv: pet |
       scan |
   services |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,710       87.10       87.10
          0 |      1,274       12.74       99.84
          1 |          4        0.04       99.88
          2 |          8        0.08       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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