Frequencies for first 10,000 rows of cstratm variable in nhamcsed2002 dataset :

    cstratm |      Freq.     Percent        Cum.
------------+-----------------------------------
   2.01e+07 |      6,032       60.32       60.32
   2.02e+07 |      2,932       29.32       89.64
   2.03e+07 |        820        8.20       97.84
   2.04e+07 |        216        2.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016