Frequencies for first 10,000 rows of sbunit_oprtn_sw variable in pos2011 dataset :

    Subunit |
  Operation |
     Switch |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        354        3.54        3.54
          N |      9,626       96.26       99.80
          Y |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Apr 2019