Frequencies for trnsmtl_num variable in hcris2552_96_2008 dataset :

transmittal |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         19        0.31        0.31
          H |        101        1.63        1.93
          J |        483        7.78        9.71
          K |      1,103       17.77       27.48
          L |        623       10.04       37.52
          M |         25        0.40       37.92
          N |      3,854       62.08      100.00
------------+-----------------------------------
      Total |      6,208      100.00

by Jean Roth , jroth@nber.org , 12 Sep 2018