Frequencies for first 10,000 rows of prov2470 variable in pos1991 dataset :

  srv: self |
  care unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,770       87.70       87.70
          0 |      1,209       12.09       99.79
          1 |         11        0.11       99.90
          2 |          6        0.06       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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