| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Average Price | ||||||||||||||
| 2006 | $1,399 | $1,240 | $1,211 | $1,314 | $1,271 | $1,258 | $1,249 | $1,275 | $1,294 | $1,881 | $1,254 | $1,263 | $1,326 | |||||||||||||
| 2007 | $1,295 | $1,310 | $1,453 | $1,537 | $2,204 | $1,434 | $1,546 | $1,578 | $1,603 | $1,511 | $1,493 | $1,531 | $1,541 | |||||||||||||
| 2008 | $1,511 | $1,653 | $1,342 | $1,467 | $1,483 | $1,503 | $1,510 | $1,464 | $1,610 | $1,393 | $1,506 | $1,594 | $1,640 | |||||||||||||
| 2009 | $2,083 | $1,419 | $1,365 | $1,461 | $1,348 | $1,299 | $1,405 | $1,255 | $1,477 | $1,264 | $1,261 | $1,313 | $1,093 | |||||||||||||
| 2010 | $1,582 | $1,731 | $3,313 | |||||||||||||||||||||||
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Median Price | ||||||||||||||
| 2006 | $ 1,150 | $ 1,175 | $ 1,150 | $ 1,195 | $ 1,195 | $ 1,195 | $ 1,200 | $ 1,200 | $ 1,200 | $ 1,200 | $ 1,195 | $ 1,195 | $1,195 | |||||||||||||
| 2007 | $ 1,200 | $ 1,200 | $ 1,200 | $ 1,295 | $ 1,295 | $ 1,250 | $ 1,297 | $ 1,295 | $ 1,295 | $ 1,295 | $ 1,200 | $ 1,295 | $1,295 | |||||||||||||
| 2008 | $ 1,200 | $ 1,200 | $ 1,200 | $ 1,250 | $ 1,250 | $ 1,275 | $ 1,250 | $ 1,250 | $ 1,250 | $ 1,245 | $ 1,250 | $ 1,200 | $1,250 | |||||||||||||
| 2009 | $ 1,200 | $ 1,200 | $ 1,200 | $ 1,200 | $ 1,200 | $1,195 | $ 1,195 | $ 1,150 | $ 1,150 | $ 1,125 | $ 1,145 | $ 1,100 | $1,172 | |||||||||||||
| 2010 | $ 1,100 | $ 1,100 | $2,200 | |||||||||||||||||||||||
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