Frequencies for first 10,000 rows of prov2470 variable in pos1998 dataset :

  srv: self |
  care unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,805       88.05       88.05
          0 |      1,178       11.78       99.83
          1 |          7        0.07       99.90
          2 |          7        0.07       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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