Table:
less than 20 employees
20 to 99 employees
100 to 499 employees
500 employees or more

employment
2,934
2,744
2,186
6,357

job vacancy rate
3.1
2.3
2.6
2.7

average hourly wage
18.44
20.89
23.08
24.68

unionization rate
7.0
18.4
31.8
41.4

departure rate
17.3
19.5
16.7
14.1

retirement rate
0.5
0.6
0.9
1.5

average age
38.5
39.1
40.3
40.0

hiring rate
41.7
41.0
35.9
30.9

proportion of hard-to-fill positions
3.3
2.3
1.8
1.8

Statement: the average age of employees in locations with 500 or more employees was 40 years old, almost two years more than in the smallest locations where the average age was 38.5 years old.
Question: what were the average age (years) of employees in locations with 500 or more employees was 40 years old and in the smallest locations respectively?
Answer: [40.0, 38.5]