Frequencies for first 10,000 rows of benefittype variable in planreporta_to_m2013 dataset :

                   Benefit Type |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                                |         69        0.69        0.69
Actuarially Equivalent Standard |        195        1.95        2.64
              Basic Alternative |      1,046       10.46       13.10
       Defined Standard Benefit |      2,162       21.62       34.72
           Enhanced Alternative |      6,528       65.28      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

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