Frequencies for first 10,000 rows of prov2520 variable in pos2005 dataset :

srv: speech |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,314       83.14       83.14
          0 |        298        2.98       86.12
          1 |        390        3.90       90.02
          2 |        659        6.59       96.61
          3 |        339        3.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017