Frequencies for first 10,000 rows of metallevel variable in plan2014 dataset :

 Metal Level |      Freq.     Percent        Cum.
-------------+-----------------------------------
      Bronze |      1,725       17.25       17.25
Catastrophic |        192        1.92       19.17
        Gold |      1,788       17.88       37.05
        High |        883        8.83       45.88
         Low |      1,097       10.97       56.85
    Platinum |        606        6.06       62.91
      Silver |      3,709       37.09      100.00
-------------+-----------------------------------
       Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 Dec 2017