Frequencies for first 10,000 rows of opccr variable in psfhos201204 dataset :

  Operating |
    Cost to |
     Charge |
      Ratio |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,783       97.83       97.83
       .202 |          8        0.08       97.91
       .217 |          6        0.06       97.97
       .226 |          1        0.01       97.98
       .228 |        184        1.84       99.82
       .251 |          1        0.01       99.83
        .28 |          2        0.02       99.85
       .296 |          3        0.03       99.88
       .321 |          1        0.01       99.89
        .33 |          1        0.01       99.90
       .344 |          1        0.01       99.91
       .384 |          1        0.01       99.92
       .409 |          4        0.04       99.96
       .742 |          1        0.01       99.97
          1 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Feb 2018