Table:
selected characteristics
on-road vehicle
off-road vehicle
all types of motor vehicles

number
percent
number
percent
number
percent

compared with other drivers, would you say that you normally drive:

slower
54,176
2.9
33,731
7.4
82,214
4.4

about the same speed
244,938
3.3
78,317
4.1
286,860
3.8

faster
229,568
7.7
67,536
6.0
266,337
9.0

compared with other drivers, would you say that you normally drive:

less aggressively
147,652
2.9
57,819
4.6
188,945
3.7

with the same aggressiveness
217,313
4.0
69,772
4.7
260,120
4.8

more aggressively
163,619
9.2
51,622
7.1
185,877
10.4

how often do you fasten your seat belt when driving?

always
443,927
3.8
133,374
4.1
532,901
4.5

most of the time, seldom or never
86,017
13.9
46,144
16.3
103,774
16.7

how often do you use a cellphone (excluding hands-free) when driving?

never
211,810
2.3
64,050
3.0
256,355
2.8

seldom, sometimes or often
318,135
9.3
115,468
8.4
380,319
11.2

frequency of alcohol consumption

once a month or less,
24,252
0.4
14,156
1.1
35,020
0.6

once a week or less
112,406
3.6
29,947
2.9
134,833
4.3

more than once a week
301,383
10.5
112,561
9.8
364,156
12.6

daily
91,812
10.0
25,922
9.1
105,662
11.4

excessive alcohol consumption,

never,
41,632
0.6
f
f
52,615
0.7

less than once a month
143,183
4.8
34,211
3.0
174,391
5.7

at least once a month
172,921
11.2
70,778
9.8
213,852
13.6

at least once a week
170,951
20.7
64,990
16.9
196,801
23.5

tobacco use

never smoked
134,347
2.5
43,399
2.9
163,804
3.0

former smoker
217,718
4.4
69,684
4.7
265,558
5.4

occasional smoker
50,168
9.0
16,282
8.5
60,685
10.5

regular smoker
127,970
7.6
53,698
9.5
150,217
8.7

index of physical activity in leisure time

active
155,909
4.3
62,899
4.5
198,207
5.3

moderately active
154,659
4.9
50,425
4.8
178,732
5.6

inactive
219,773
3.9
69,738
5.3
263,464
4.6

daily consumption of fruits and vegetables

5 or more servings a day
115,830
2.5
37,261
2.7
138,988
3.0

3 or 4 servings a day
172,393
4.0
59,727
4.7
215,884
4.9

less than 3 servings a day
226,491
7.5
82,524
8.7
268,110
8.6

Statement: the highest proportion of impaired drivers was noted among those who reported excessive drinking at least once a week.
Question: among whom was the highest proportion of impaired drivers noted?
Answer: excessive alcohol consumption,, at least once a week