数据如下,还是要靠市场自身的规律了。' t& B( ?0 X* g" ^
- P8 V/ ?+ p4 w7 L, h/ v19910701 -.52
9 s4 X/ y& b. s; w# Y19920701 .25
# v2 l+ z" ^( o; @: E19930701 -.95: c+ j/ D/ E; R9 c7 ?. o7 N3 b# [
19940701 -2.336 k6 n. A( d) o4 D! f7 P
19960701 -5.36. R3 ^2 n$ `9 B I* a
19980701 -1.70
9 `3 U+ V* z1 [' U1 j19990701 -7.61
2 m. H. f6 I) g* P5 _! ^20020701 -1.102 R) L t. X1 P- m
20030701 -.09( S$ \3 I5 n! S
20040701 3.00
3 F" H- I; F6 f; w20050701 -2.35
- Y: \7 }/ {$ V8 K- D6 \20080701 -3.09
& l$ S% W+ {) q; e4 [20090701 1.656 Y) H2 K1 E* D
20100701 -1.02
" h2 H7 D8 Z- I4 P; K& o/ z% F20110701 -.10
$ Q `* M+ t2 y, ?* d20130701 .81
* M {! F: {- i20140701 .10 |