Frequencies for first 10,000 rows of prov1150 variable in pos1999 dataset :

 registered |
    nurse - |
   contract |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,925       99.25       99.25
        .06 |          2        0.02       99.27
        .11 |         11        0.11       99.38
        .13 |          1        0.01       99.39
        .17 |          1        0.01       99.40
         .2 |          1        0.01       99.41
        .23 |          6        0.06       99.47
        .25 |          1        0.01       99.48
        .26 |          1        0.01       99.49
        .34 |          4        0.04       99.53
         .4 |          1        0.01       99.54
        .43 |          2        0.02       99.56
        .44 |          1        0.01       99.57
        .46 |          6        0.06       99.63
        .57 |          1        0.01       99.64
        .66 |          1        0.01       99.65
        .69 |          1        0.01       99.66
         .7 |          1        0.01       99.67
         .8 |          1        0.01       99.68
        .81 |          1        0.01       99.69
        .91 |          1        0.01       99.70
        .96 |          1        0.01       99.71
       1.09 |          1        0.01       99.72
       1.14 |          3        0.03       99.75
       1.34 |          1        0.01       99.76
       1.37 |          1        0.01       99.77
        1.4 |          1        0.01       99.78
       1.49 |          1        0.01       99.79
        1.6 |          3        0.03       99.82
       1.71 |          1        0.01       99.83
       1.93 |          1        0.01       99.84
       1.94 |          1        0.01       99.85
          2 |          1        0.01       99.86
       2.29 |          1        0.01       99.87
        2.3 |          1        0.01       99.88
       3.31 |          1        0.01       99.89
       3.49 |          1        0.01       99.90
       3.69 |          1        0.01       99.91
       4.57 |          1        0.01       99.92
        4.8 |          1        0.01       99.93
       5.01 |          1        0.01       99.94
       6.51 |          1        0.01       99.95
      11.43 |          1        0.01       99.96
      45.71 |          1        0.01       99.97
     114.29 |          1        0.01       99.98
     171.43 |          1        0.01       99.99
     263.93 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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