Frequencies for first 10,000 rows of a_hr variable in acc_aux dataset :

Involving a |
Hit and Run |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        626        6.26        6.26
          2 |      9,374       93.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016