This is for delivery in May of 2008

这是2008年5月交割的合约
and these contracts go out to 2010.

下面还有到2010年交割的合约
This doesn't shown open interest

上面没有显示未平仓合约
but you understand what this is

你们知道这是什么意思
Now, the real--the price that we talk about

我们现在谈论的价格
when we talk about commodities is the futures price, overwhelmingly.

当我们说商品价格主要是指期货价格
This is the Chicago Board of Trade price for corn since 1929.

这是1929年以来的芝加哥期货交易所玉米价格
We could take it even further back,

我们可以得到甚至更早的数据
but futures exchanges have been going since--

期货交易始于
the CBOT goes back to the 1860s.

芝加哥期货交易所成立于19世纪60年代
Anyway, this is a long time horizon plot of the price of corn

总之这是跨度时间很长的玉米价格图
and I adjusted it for CPI inflation,

我进行了消费物价通胀的修正