Frequencies for rollupcount variable in count2540_10 dataset :

     Rollup |
      Count |      Freq.     Percent        Cum.
------------+-----------------------------------
     248538 |          1       14.29       14.29
    1258111 |          1       14.29       28.57
    1440089 |          1       14.29       42.86
    1455963 |          1       14.29       57.14
    1479354 |          1       14.29       71.43
    1844575 |          1       14.29       85.71
    2471861 |          1       14.29      100.00
------------+-----------------------------------
      Total |          7      100.00

by Jean Roth , jroth@nber.org , 19 Apr 2018