Guess the age of "Karsten"

The image look of "Karsten" on and guess the age. Find out how well you can estimate the age?

How old is Karsten?

Your assessment of the age: ?
Real age: 20

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1138 people have appreciated it.

Statistics on the age

Age	Number of votes
6		2
7		3
8		4
9		2
10		3
11		11
12		5
13		5
14		9
15		23
16		56
17		146
18		126
19		173
20		147
21		74
22		79
23		79
24		41
25		44
26		32
27		17
28		20
29		4
30		9
31		5
32		7
33		7
34		5

Average estimated age: 20.1 years