Frequencies for clmn_num variable in cmh_alph_wksht_clmn_line_combos dataset :

   clmn_num |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |        180       27.91       27.91
       0100 |        150       23.26       51.16
       0101 |          6        0.93       52.09
       0102 |          6        0.93       53.02
       0200 |         93       14.42       67.44
       0300 |         74       11.47       78.91
       0301 |          1        0.16       79.07
       0400 |         18        2.79       81.86
       0500 |         44        6.82       88.68
       0501 |          2        0.31       88.99
       0600 |         10        1.55       90.54
       0700 |          6        0.93       91.47
       0800 |          5        0.78       92.25
       0900 |          5        0.78       93.02
       1000 |          6        0.93       93.95
       1100 |         13        2.02       95.97
       1200 |          5        0.78       96.74
       1201 |          3        0.47       97.21
       1300 |          5        0.78       97.98
       1301 |          4        0.62       98.60
       1302 |          4        0.62       99.22
       1400 |          5        0.78      100.00
------------+-----------------------------------
      Total |        645      100.00

by Jean Roth , jroth@nber.org , 19 Apr 2018