单位：元/吨
日期	价格	平均价格	跌涨
2011-6-8	172500-174000	173250	0
2011-6-7	172500-174000	173250	-500
2011-6-3	173000-174500	173750	-1000
2011-6-2	174000-175500	174750	-1500
2011-6-1	175500-177000	176250	500
2011-5-31	175000-176500	175750	0
2011-5-30	175000-176500	175750	1000
2011-5-27	174000-155000	174750	-1750
2011-5-26	176000-177000	176500	2250
2011-5-25	173500-175000	174250	1250
2011-5-24	172000-174000	173000	-6000
2011-5-23	178500-179500	179000	-3000
2011-5-20	181500-182500	182000	-4000
2011-5-19	185500-186500	186000	1500
2011-5-18	184000-185000	184500	500
2011-5-17	183500-184500	184000	-500
2011-5-16	184000-185000	184500	-1000
2011-5-13	185000－186000	185500	-500
2011-5-12	185500－186500	186000	-3000
2011-5-11	188500－189500	189000	0
2011-5-10	188500－189500	189000	0
2011-5-9	188500－189500	189000	0
2011-5-6	188500－189500	189000	-3000