Frequencies for first 10,000 rows of clmn_num variable in snf_nmrc2540_96_2002_

   clmn_num |      Freq.     Percent        Cum.
------------+-----------------------------------
       0100 |      2,792       27.92       27.92
       0200 |      4,589       45.89       73.81
       0400 |      1,082       10.82       84.63
       0600 |      1,537       15.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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