Frequencies for first 10,000 rows of prov4270 variable in posclia2001 dataset :

   prov4270 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,981       99.81       99.81
 01D0961240 |          3        0.03       99.84
 01D0961241 |          5        0.05       99.89
 03D0892889 |          1        0.01       99.90
 03D0893377 |          1        0.01       99.91
 03D0893820 |          1        0.01       99.92
 03D0898104 |          7        0.07       99.99
 03D0902109 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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