Frequencies for first 10,000 rows of elgblty_sw variable in pos2012 dataset :

Eligibility |
     Switch |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.01        0.01
          N |      2,079       20.79       20.80
          Y |      7,920       79.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016