Frequencies for first 10,000 rows of rollover variable in person dataset :

   rollover |
       type |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,198       71.98       71.98
          1 |      1,629       16.29       88.27
          2 |        196        1.96       90.23
          9 |         24        0.24       90.47
          . |        953        9.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016