Frequencies for first 10,000 rows of prov2015 variable in pos1995 dataset :

        800 |
radiobioass |
         ay |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,884       88.84       88.84
          N |      1,108       11.08       99.92
          Y |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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