. . . - - . . . .

.   . .

() " 80% " 20%  . " " .

1991 " ". . !

( ) " " ! ! " ". " ". . .

" . ". " ".

( ) " " " ( )   . ( ) ". .

! - - . . !

. ! . . . . .

. . . ! . . . - - . " " . :-

. " (2000- 3000) " . . " 800 . ".

: . . . . . ( : ).

. . . . " ". ! .

: . . . . . .

: . .   . . . .

. . .   , . .

.