Frequencies for first 10,000 rows of sumlev variable in sf12010880us12 dataset :

    Summary |
     Level2 |      Freq.     Percent        Cum.
------------+-----------------------------------
        880 |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017