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

    Subunit |
     Switch |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        354        3.54        3.54
          N |      9,548       95.48       99.02
          Y |         98        0.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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