Frequencies for first 10,000 rows of benefittype variable in planreport2007 dataset :

                   Benefit Type |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
Actuarially Equivalent Standard |        241        2.41        2.41
              Basic Alternative |      2,825       28.25       30.66
       Defined Standard Benefit |        558        5.58       36.24
           Enhanced Alternative |      6,376       63.76      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 14 Apr 2016