Frequencies for first 10,000 rows of acc_d_mdtime variable in mcbsatc2013 datas

    Minutes |
  waited at |
         MD |      Freq.     Percent        Cum.
------------+-----------------------------------
         -8 |        177        1.77        1.77
         -7 |          3        0.03        1.80
          1 |      8,423       84.23       86.03
          2 |        382        3.82       89.85
          3 |        134        1.34       91.19
          . |        881        8.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 24 May 2016