Frequencies for first 10,000 rows of cstratm variable in nhamcsed2010 dataset :

  Clustered |
 CSTRATM -- |
     masked |      Freq.     Percent        Cum.
------------+-----------------------------------
   2.01e+07 |        759        7.59        7.59
   2.02e+07 |      1,010       10.10       17.69
   2.03e+07 |        673        6.73       24.42
   2.04e+07 |      1,606       16.06       40.48
   4.01e+07 |        931        9.31       49.79
   4.02e+07 |      1,387       13.87       63.66
   4.03e+07 |      3,154       31.54       95.20
   4.04e+07 |        480        4.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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