Frequencies for first 10,000 rows of prov3475 variable in pos2006 dataset :

       srv: |
vocational- |
 onsite-non |
      resid |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,456       74.56       74.56
          N |      2,533       25.33       99.89
          Y |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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