Frequencies for pickle variable in hcris2552_96_1997 dataset :

     pickle |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,367       99.80       99.80
          N |         13        0.20      100.00
------------+-----------------------------------
      Total |      6,380      100.00

by Jean Roth , jroth@nber.org , 6 Sep 2018