Frequencies for first 10,000 rows of prov1950 variable in pos1994 dataset :

330   other |
  chemistry |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,798       87.98       87.98
          N |        474        4.74       92.72
          Y |        728        7.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017