While the downturn in the 70's chart from the established high was only a 2 year excursion as opposed to the nearly 3 year drop in that of the new millenium chart, I found the percentage of the correction as well as the recovery high and prolonged sideways to downward movement thereafter rather intriguing.
If we were to extapolate the current millenium charts movement vs. that of the 1977-78 timeframe, what we may see is a bottom established in mid/end 2005 followed by an upward thrust into 2006. Food for thought...