. 13 ( ), . , , . , . 3-4 , . , .
3(). 7- .
. 3- :
15: 14% (123 )
16: 21% (180 )
17: 58% ( " 17 ")
18: 15% (135 )
19: 9%
20: 13%
21: 13%
5 ( ).