Frequencies for first 10,000 rows of cstratm variable in namcs2011 dataset :

  Clustered |
 CSTRATM -- |
     masked |      Freq.     Percent        Cum.
------------+-----------------------------------
   2.01e+07 |        147        1.47        1.47
   2.01e+07 |        223        2.23        3.70
   2.01e+07 |        134        1.34        5.04
   2.01e+07 |        255        2.55        7.59
   2.01e+07 |        146        1.46        9.05
   2.02e+07 |        387        3.87       12.92
   2.02e+07 |        333        3.33       16.25
   2.02e+07 |        181        1.81       18.06
   2.02e+07 |        169        1.69       19.75
   2.02e+07 |         86        0.86       20.61
   2.03e+07 |        137        1.37       21.98
   2.03e+07 |        178        1.78       23.76
   2.03e+07 |        112        1.12       24.88
   2.03e+07 |        343        3.43       28.31
   2.04e+07 |        499        4.99       33.30
   2.04e+07 |        299        2.99       36.29
   2.04e+07 |        262        2.62       38.91
   2.04e+07 |        495        4.95       43.86
   4.01e+07 |        908        9.08       52.94
   4.02e+07 |      1,634       16.34       69.28
   4.03e+07 |      2,196       21.96       91.24
   4.04e+07 |        876        8.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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