Frequencies for first 10,000 rows of prov1305 variable in pos1993 dataset :

 tech super |
    - ba/bs |
   radiobio |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,997       99.97       99.97
          1 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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