4
middle-aged
2
2
3
8
2
6
6
3
1
4
1
4
6
9
4
5
4
5
2
6
2
3
7
7
7
10
6
4
6
7
4
11
10
9
6
2
5
7
8
7
19
5
10
3
7
3
4
7
9
