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

   Rollover |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,027       70.27       70.27
          1 |        965        9.65       79.92
          2 |      1,262       12.62       92.54
          . |        746        7.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016