Frequencies for first 10,000 rows of clmn_num variable in snf_nmrc2540_96_1997_

   clmn_num |      Freq.     Percent        Cum.
------------+-----------------------------------
       0100 |      2,694       26.94       26.94
       0200 |      4,364       43.64       70.58
       0400 |      1,114       11.14       81.72
       0600 |      1,828       18.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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