Table:
industry
naics
researchers/ total r&d employment
phd researchers/ researchers
research/ total r&d performed
development/ total r&d performed

all industries
21-33, 42-81
69.9
11.3
22.9
77.1

manufacturing industries
31-33
70.8
11.9
24.5
75.5

chemicals
325
68.2
25.4
35.2
64.8

pharmaceuticals and medicines
3254
69.1
25.9
35.6
64.4

machinery
333
70.5
7.3
17.4
82.6

computer and electronic products
334
81.4
10.7
16.5
83.5

electrical equipment, appliances, and components
335
71.4
10
21.8
78.2

transportation equipment
336
72.6
5.7
21.4
78.6

automobiles, bodies, trailers, and parts
3361-63
78.3
4.2
na
na

aerospace products and parts
3364
68.9
9.5
20.2
79.8

nonmanufacturing industries
21-23, 42-81
68.5
10
19.6
80.4

information
51
76.9
7
12.5
87.5

publishing
511
83.9
4.2
11.7
88.3

professional, scientific, and technical services
54
67.5
14.8
33.4
66.6

architectural, engineering, and related services
5413
73.9
17.6
51.4
48.6

computer systems design and related services
5415
77.2
11.3
26.8
73.2

scientific research and development services
5417
53.2
21.4
37.6
62.4

Statement: the scientific r&d services industries had the largest shares of phds researchers relative to their industry's total researchers among 4-digit industries employing 5,000 or more phd researchers.
Question: how many percent of the scientific r&d services industries had the largest shares of phds researchers relative to their industry's total researchers among 4-digit industries employing 5,000 or more phd researchers?
Answer: [21.4]