Frequencies for first 10,000 rows of prov1520 variable in pos1991 dataset :

        pps |
   previous |
   provider |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,973       99.73       99.73
     000000 |          2        0.02       99.75
     010140 |          1        0.01       99.76
     010141 |          1        0.01       99.77
     010147 |          1        0.01       99.78
     040034 |          1        0.01       99.79
     040117 |          1        0.01       99.80
     040125 |          1        0.01       99.81
     050123 |          1        0.01       99.82
     050130 |          1        0.01       99.83
     050554 |          1        0.01       99.84
     050611 |          1        0.01       99.85
     050628 |          1        0.01       99.86
     050639 |          1        0.01       99.87
     050645 |          1        0.01       99.88
     050653 |          1        0.01       99.89
     050655 |          1        0.01       99.90
     052004 |          1        0.01       99.91
     052019 |          1        0.01       99.92
     052025 |          1        0.01       99.93
     052030 |          1        0.01       99.94
     060078 |          1        0.01       99.95
     060091 |          1        0.01       99.96
     062002 |          1        0.01       99.97
     062003 |          1        0.01       99.98
     062006 |          1        0.01       99.99
     062007 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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