Frequencies for first 10,000 rows of mdrdstrd variable in distract dataset :

     Driver |
 Distracted |
         By |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,766       67.66       67.66
          1 |        159        1.59       69.25
          3 |         35        0.35       69.60
          4 |          4        0.04       69.64
          5 |         24        0.24       69.88
          6 |          5        0.05       69.93
          7 |         17        0.17       70.10
          9 |          2        0.02       70.12
         10 |         14        0.14       70.26
         12 |         52        0.52       70.78
         13 |         11        0.11       70.89
         14 |          3        0.03       70.92
         15 |         18        0.18       71.10
         16 |        364        3.64       74.74
         92 |         99        0.99       75.73
         96 |      1,823       18.23       93.96
         97 |         24        0.24       94.20
         98 |         49        0.49       94.69
         99 |        531        5.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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