Frequencies for first 10,000 rows of clmn_num variable in snf_nmrc2540_96_2001_

   clmn_num |      Freq.     Percent        Cum.
------------+-----------------------------------
       0100 |      2,809       28.09       28.09
       0200 |      4,777       47.77       75.86
       0400 |        945        9.45       85.31
       0600 |      1,469       14.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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