Frequencies for first 10,000 rows of metallevel variable in plan2017 dataset :

 Metal Level |      Freq.     Percent        Cum.
-------------+-----------------------------------
      Bronze |      2,111       21.11       21.11
Catastrophic |        225        2.25       23.36
        Gold |      1,448       14.48       37.84
        High |        628        6.28       44.12
         Low |        715        7.15       51.27
    Platinum |        222        2.22       53.49
      Silver |      4,651       46.51      100.00
-------------+-----------------------------------
       Total |     10,000      100.00

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