0.40 ~
0.35
0,30
~ 0.25
F
r 0.20
0,15
0.10
0.05
o.oo 1979 1980
3.5
3,0
2.5 r
~ 2.0
F
r 1.5
-
-
n
1.0
0.5
IrI"•
~- 1 r~
'
~'
i
o.o 1919 1980 1981
3.0
2.5 l
2.0
.
Q
1,5
-F
r 1,0
0.5
o.o
40
35
-
30
-
25
-
Q
F 20
-
-
-
sr
1
15
10
-
-
jl
~
0
1979
1 ...
1981
196>
80 r~
70
60
:;, so
F
sr
40 r
30
:11
0
1979
1980
1981
.... 11i83 llil8•
b
R
E
- - -
-
-
-
-
-
1 -
-
-
-
-
~
n
L
1
1
1
1985
1986
1917
1991
1989
1990
1991
1985
.... 1987 1988 1989 1990 ""
T
A
G
/V
3000
2500 - - - -
::,2000 l
-F
rlsoo
1000
800 l
700
600
~': 400
Ji'
sr 300
200
100
1979
1980
Q
: ~
F 4
sr
2 l
0
1979
1980
1981
:c
~ 30
~: I
197'
1980
1981
10
c
- -
1 -
-~
-
t
1 ...
1 . . 5
.... 1987 .... 1989 1990 ""
1991
-
11991
198>
1983
1 ...
s
u
0