Koptelefoons
10%
24%
32%
57%
45%
13%
21%
19%
21%
31%
28%
41%
48%
1%
41%
11%
32%
11%
41%
17%
41%
35%
41%
18%
35%
26%
19%
17%
7%
28%
21%
7%
20%
10%
28%
34%
2%
18%
46%