Frequencies for first 10,000 rows of prov5280 variable in pos1997 dataset :

   srv: oth |
        soc |
 srv-onsite |
  to nonres |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,405       74.05       74.05
          N |      2,565       25.65       99.70
          Y |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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