日期	指数 (元/吨)	涨跌
20131008	19158	-3
20130930	19158	-3
20130929	19161	-1
20130927	19162	2
20130926	19160	3
20130925	19157	5
20130924	19152	-3
20130923	19155	5
20130922	19150	1
20130918	19149	3
20130917	19146	4
20130916	19142	5
20130913	19137	-4
20130912	19141	-2
20130911	19143	-4
20130910	19147	-2
20130909	19149	0
20130906	19149	-1
20130905	19149	-1
20130904	19150	-2