Frequencies for first 10,000 rows of prov2470 variable in pos2004 dataset :

  srv: self |
  care unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,766       87.66       87.66
          0 |      1,216       12.16       99.82
          1 |          6        0.06       99.88
          2 |          9        0.09       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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