Frequencies for first 10,000 rows of visual variable in namcs1996 dataset :

     visual |
     acuity |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,463       94.63       94.63
          1 |        537        5.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016