Male and female populations of humpback whales under 80 years old are represented by age in the table below. Which gender has the higher mean age?

Age Males Females
0 - 9 10 6
10 - 19 15 9
20 - 29 15 13
30 - 39 19 20
40 - 49 23 23
50 - 59 22 23
60 - 69 18 20
70 - 79 15 14