0,15
••:; .. 11.w
0.12
0.06
0.03
o.oo 1979 19!10 1981
1982 \,,
1983
1984
1sas
1sas
1ss1
1m
1~9
1m
2.0
1.5
~
1.0
go
0.5
0,0
1979
3.s - -
3.0
2,5
2,0
~
Jf 1,5
go
1,0
0.5
0.0
1979
60
50
40
;:,
Jf 30
'!:
20
10
20 r -
15
~
fi' 10
sr
1980
1981
1912
1979
1980
1981
1982
1W
100 1
B O i--"'
1
li
60 .___
Il!
g
E
- DDD
19$4
1985
1991
250
200 1.---- ,_
;:,
-Jf 150
: -
- - -
go
!l
J
-
100
11
Il
0
50
li
1979
1980
1931
~ ~
15
;:,
~
go
10
600
500
400
-~ 300
~
200
100
1979
1980
1981
20
+------!
;:,
~ 10 - -- - - - -- -.
sr
L. ~-~
1979
1980
1S8 1
0
197t
1980
1901
1982
1913
1084
1985
1m
1 . . 1
1 .. 7
1 ...
1989
1990
1991
0
H
u