Frequencies for first 10,000 rows of prov3475 variable in pos2009 dataset :

       SRV: |
VOCATIONAL- |
 ONSITE-NON |
      RESID |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,657       76.57       76.57
          N |      2,339       23.39       99.96
          Y |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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