Frequencies for first 10,000 rows of sbunit_oprtn_sw variable in pos2018 dataset :

    Subunit |
  Operation |
  Indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,921       89.21       89.21
          N |      1,068       10.68       99.89
          Y |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Feb 2019