Frequencies for grouperv variable in impact2002 dataset :

    Grouper |
Version for |
 caseta and |
  cmiv type |
  variables |      Freq.     Percent        Cum.
------------+-----------------------------------
         19 |      4,886      100.00      100.00
------------+-----------------------------------
      Total |      4,886      100.00

by Jean Roth , jroth@nber.org , 17 Mar 2016