Frequencies for first 10,000 rows of ca_limb variable in natlterr2009 dataset :

       Limb |
  Reduction |
 Defect RFP |
641=f_ca_li |
       mb R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,449       24.49       24.49
          N |      7,543       75.43       99.92
          U |          2        0.02       99.94
          Y |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015