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

   Rollover |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,999       69.99       69.99
          1 |        883        8.83       78.82
          2 |      1,253       12.53       91.35
          . |        865        8.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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