Frequencies for first 10,000 rows of prov2400 variable in pos1991 dataset :

      spec: |
    plastic |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,683       96.83       96.83
          N |        142        1.42       98.25
          Y |        175        1.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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