Frequencies for first 10,000 rows of prov1150 variable in pos1993 dataset :

 registered |
    nurse - |
   contract |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,914       99.14       99.14
        .01 |          1        0.01       99.15
        .03 |          1        0.01       99.16
        .06 |          3        0.03       99.19
        .07 |          1        0.01       99.20
        .09 |          1        0.01       99.21
        .11 |         19        0.19       99.40
        .14 |          1        0.01       99.41
        .16 |          1        0.01       99.42
        .17 |          3        0.03       99.45
        .23 |          6        0.06       99.51
        .25 |          2        0.02       99.53
        .26 |          1        0.01       99.54
        .31 |          1        0.01       99.55
        .34 |          3        0.03       99.58
        .36 |          1        0.01       99.59
         .4 |          1        0.01       99.60
        .43 |          2        0.02       99.62
        .46 |          6        0.06       99.68
        .51 |          1        0.01       99.69
        .69 |          2        0.02       99.71
         .7 |          1        0.01       99.72
        .91 |          1        0.01       99.73
       1.03 |          2        0.02       99.75
       1.09 |          1        0.01       99.76
       1.14 |          4        0.04       99.80
       1.17 |          1        0.01       99.81
       1.26 |          2        0.02       99.83
       1.36 |          1        0.01       99.84
       1.37 |          1        0.01       99.85
       1.49 |          1        0.01       99.86
       1.71 |          1        0.01       99.87
       1.94 |          1        0.01       99.88
          2 |          2        0.02       99.90
       2.29 |          1        0.01       99.91
       2.49 |          1        0.01       99.92
       3.26 |          1        0.01       99.93
       3.46 |          1        0.01       99.94
        4.8 |          1        0.01       99.95
      11.43 |          2        0.02       99.97
      21.43 |          1        0.01       99.98
      22.86 |          1        0.01       99.99
      48.57 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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