,    . 
       , 
       
    .    -
  8 ,   - 9-10 ,  
10-12 .     .  
   : 1)  - 50-60%, 
  - 18-22%, - -13-17%,  - 3-5%, 
  - 2-4%;
2)   - 45-55%,   - 35-40%, - - 6-
8%, 4-6%.
:
  •       

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