Frequencies for first 10,000 rows of clmn_num variable in snf_nmrc2540_96_2000_

   clmn_num |      Freq.     Percent        Cum.
------------+-----------------------------------
       0100 |      2,702       27.02       27.02
       0200 |      4,331       43.31       70.33
       0400 |      1,194       11.94       82.27
       0600 |      1,773       17.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Feb 2018