Frequencies for first 10,000 rows of prov1615 variable in posclia1997 dataset :

   prov1615 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,969       99.69       99.69
   19930101 |          1        0.01       99.70
   19931110 |          3        0.03       99.73
   19941228 |          1        0.01       99.74
   19950103 |          1        0.01       99.75
   19950116 |          1        0.01       99.76
   19950428 |          1        0.01       99.77
   19950501 |          1        0.01       99.78
   19950801 |          1        0.01       99.79
   19951109 |          1        0.01       99.80
   19951201 |          1        0.01       99.81
   19960101 |          7        0.07       99.88
   19960301 |          1        0.01       99.89
   19960401 |          1        0.01       99.90
   19960516 |          1        0.01       99.91
   19960524 |          1        0.01       99.92
   19960601 |          1        0.01       99.93
   19960701 |          2        0.02       99.95
   19970101 |          1        0.01       99.96
   19970131 |          1        0.01       99.97
   19970310 |          1        0.01       99.98
   19970515 |          1        0.01       99.99
   19970602 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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