Frequencies for pickle variable in hcris2552_96_1999 dataset :

     pickle |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,181       99.53       99.53
          N |         29        0.47      100.00
------------+-----------------------------------
      Total |      6,210      100.00

by Jean Roth , jroth@nber.org , 7 Sep 2018