Frequencies for first 10,000 rows of prov2090 variable in pos1991 dataset :

  srv: burn |
  care unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,770       87.70       87.70
          0 |      1,165       11.65       99.35
          1 |         31        0.31       99.66
          2 |         30        0.30       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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