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数据如下，还是要靠市场自身的规律了。' h* G3 Z" V' ~( X7 b \
& ]8 k$ U2 w+ X: v. C! P" X
19910701 -.52
& ]: m8 G0 r8 K( e4 L, b$ G19920701 .25
) ^5 c2 C' r+ B9 u- h19930701 -.95- c" F& n8 v+ r( S+ ]: V' c/ Y# j
19940701 -2.33' X" _1 I/ D F2 D; ~+ l5 ^
19960701 -5.36
, L' E. ?: |+ e7 R% n3 d19980701 -1.70
% |3 v! ^1 Y9 d) S19990701 -7.61
/ d' g6 R4 I; S3 G/ C/ {; o6 }20020701 -1.10
! ~3 o3 v$ y! a+ p. u( H20030701 -.09
7 n% O2 j {- H; J5 `20040701 3.002 {- H# ]9 O0 i. @ Y/ ]
20050701 -2.35' T: i, ?; H) D2 X( m3 k
20080701 -3.09
# a1 y$ P' R6 D2 N7 w20090701 1.65
% g; ?/ A9 _( {20100701 -1.02& s7 M% n( o8 \% W
20110701 -.10+ K" w Y6 k( R0 v
20130701 .81
% j" R' }' Q% c' w" K20140701 .10 | 
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发表于 2019-5-21 23:12:38