Frequencies for first 10,000 rows of clmn_num variable in snf_nmrc2540_96_1999_

   clmn_num |      Freq.     Percent        Cum.
------------+-----------------------------------
       0100 |      2,692       26.92       26.92
       0200 |      4,440       44.40       71.32
       0400 |      1,377       13.77       85.09
       0600 |      1,491       14.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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