Table:
canada
oil-producing provinces
central provinces
other provinces

percent

all occupational categories
2.7
4.2
2.4
2.5

managers and senior managers
2.4
3.6
2.2
2.2

professionals
3.4
3.7
3.4
2.9

technical personnel
4.0
6.4
3.6
3.0

trades workers
3.6
7.2
2.7
3.3

apprentices
2.7
3.0
2.4
3.0

sales and marketing personnel
1.9
3.8
1.8
1.4

administrative and office personnel
2.0
2.4
2.0
1.8

production or services workers
2.5
4.2
2.1
2.6

others
2.0
3.8
1.5
2.0

Statement: the number of jobs for production and services workers and for sales personnel were higher in oil-producing provinces than central provinces and other groups.
Question: which province need production and services workers and sales personnel most?
Answer: oil-producing provinces