Frequencies for first 10,000 rows of clmn_num variable in snf_nmrc2540_96_1998_

   clmn_num |      Freq.     Percent        Cum.
------------+-----------------------------------
       0100 |      2,642       26.42       26.42
       0200 |      4,286       42.86       69.28
       0400 |      1,138       11.38       80.66
       0600 |      1,934       19.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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