Frequencies for first 10,000 rows of prov3475 variable in pos2004 dataset :

       srv: |
vocational- |
 onsite-non |
      resid |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,489       74.89       74.89
          N |      2,503       25.03       99.92
          Y |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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