Frequencies for first 10,000 rows of hlt_eccatop variable in mcbsatc2013 datase

   Ever had |
  operation |
        for |
  cataracts |      Freq.     Percent        Cum.
------------+-----------------------------------
         -8 |         10        0.10        0.10
          1 |      3,334       33.34       33.44
          2 |      5,594       55.94       89.38
          . |      1,062       10.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 24 May 2016