Frequencies for s5_c6_4 variable in hcris2552_10_2011 dataset :

       capd |
  exchanges |
    per day |
    s500000 |
00400 00600 |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |          1        0.02        0.02
          4 |         67        1.09        1.11
       4.29 |          1        0.02        1.12
        4.5 |          2        0.03        1.15
          5 |         12        0.20        1.35
          6 |          5        0.08        1.43
        7.2 |          1        0.02        1.45
          8 |          1        0.02        1.46
          9 |          1        0.02        1.48
         10 |          3        0.05        1.53
      10.26 |          1        0.02        1.54
       10.6 |          1        0.02        1.56
      11.38 |          1        0.02        1.58
         19 |          1        0.02        1.59
          . |      6,052       98.41      100.00
------------+-----------------------------------
      Total |      6,150      100.00

by Jean Roth , jroth@nber.org , 23 Aug 2018