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

   rollover |
       type |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,079       70.79       70.79
          1 |      1,758       17.58       88.37
          2 |        215        2.15       90.52
          9 |         11        0.11       90.63
          . |        937        9.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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