Frequencies for first 10,000 rows of benefittype variable in planreport2006 dataset :

                   Benefit Type |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                                |         56        0.56        0.56
Actuarially Equivalent Standard |      1,058       10.58       11.14
              Basic Alternative |      1,715       17.15       28.29
       Defined Standard Benefit |      1,673       16.73       45.02
           Enhanced Alternative |      5,498       54.98      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

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