Frequencies for first 10,000 rows of benefittype variable in planreport2010 dataset :

                   Benefit Type |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                                |      4,783       47.83       47.83
Actuarially Equivalent Standard |        277        2.77       50.60
              Basic Alternative |      1,009       10.09       60.69
       Defined Standard Benefit |      1,130       11.30       71.99
           Enhanced Alternative |      2,801       28.01      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

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