, . , , , , , ..
( ) [5, c.110]. , , , .
, , , , , , .. . . , , , , , , . , [12, c.89].
:
1. ( ), :
= (2.3)
;
;
;
;
.
2014 = = 0,877
2015 = = 0,652
, , . >1,5.
2. ( ) :
= , (2.4)
, ;
.
2014 = = 1,056
2015 = = 1,064
0,008 .. , 1,5. , . .