Frequencies for first 10,000 rows of prov2915 variable in pos1992 dataset :

 special ro |
 date field |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,976       99.76       99.76
     920223 |          1        0.01       99.77
     920224 |          1        0.01       99.78
     920316 |          5        0.05       99.83
     920430 |          1        0.01       99.84
     920811 |          4        0.04       99.88
     920925 |          1        0.01       99.89
     921202 |          1        0.01       99.90
     921203 |          9        0.09       99.99
     930128 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017