Frequencies for first 10,000 rows of benefittype variable in planreport2011 dataset :

                   Benefit Type |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                                |      4,556       45.56       45.56
Actuarially Equivalent Standard |        233        2.33       47.89
              Basic Alternative |      1,103       11.03       58.92
       Defined Standard Benefit |      1,262       12.62       71.54
           Enhanced Alternative |      2,846       28.46      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

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