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数据如下,还是要靠市场自身的规律了。& k+ m) W7 K, W6 N5 B; s# H+ b" [3 G
k8 ~0 t9 h; _# y19910701 -.52
6 @# q- g& x" Z: @7 c19920701 .253 V! q' G( x1 c8 m# q0 T: M& V
19930701 -.95
5 E* N5 _) ^; U7 M$ T19940701 -2.33
- z" E/ ]" K+ b2 K/ F& @5 k19960701 -5.36
/ G- W4 R9 o9 V( y. Y2 I2 V- f) l* R19980701 -1.70& ]* c* P; }1 l) Y, q5 w/ K
19990701 -7.61
$ A* z6 w5 Y# O/ V20020701 -1.10+ I: j. M- N- [; R X' A- W0 {6 A
20030701 -.09$ W4 Z7 Q' F( w/ j
20040701 3.00
. }. ^& O4 ^6 N/ w20050701 -2.35# u! a/ g2 Z; o: [5 K3 Z
20080701 -3.09# m' r+ l. x. J5 Q& \5 [! C! l
20090701 1.65
3 W- _2 ~- ]! I) Y9 b20100701 -1.02
4 w; j4 c* u0 L1 `3 t* v4 h0 P9 B20110701 -.10
- H( j* D q& z' `( s* s8 V7 P20130701 .81/ X, b$ z' O$ c+ B) x1 q
20140701 .10 |