Frequencies for clmn_num variable in snf_alpha2540_96_2012_long dataset :

   clmn_num |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |         64       56.14       56.14
       0100 |         26       22.81       78.95
       0200 |          7        6.14       85.09
       0201 |          1        0.88       85.96
       0300 |          4        3.51       89.47
       0400 |          1        0.88       90.35
       0500 |          2        1.75       92.11
       0600 |          1        0.88       92.98
       0700 |          1        0.88       93.86
       0800 |          1        0.88       94.74
       0900 |          1        0.88       95.61
       1000 |          1        0.88       96.49
       1100 |          1        0.88       97.37
       1200 |          1        0.88       98.25
       1300 |          1        0.88       99.12
       1500 |          1        0.88      100.00
------------+-----------------------------------
      Total |        114      100.00

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