Frequencies for first 10,000 rows of prov1720 variable in posclia2003 dataset :

   prov1720 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.01        0.01
          A |      9,999       99.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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