Democrats VS Republicans

[catchacab]

Phokaioglaukos wrote:

October 14, 2008
Bulls, Bears, Donkeys and Elephants

By TOMMY McCALL
Since 1929, Republicans and Democrats have each controlled the presidency for nearly 40 years. So which party has been better for American pocketbooks and capitalism as a whole? Well, here’s an experiment: imagine that during these years you had to invest exclusively under either Democratic or Republican administrations. How would you have fared?

As of Friday, a $10,000 investment in the S.& P. stock market index* would have grown to $11,733 if invested under Republican presidents only, although that would be $51,211 if we exclude Herbert Hoover’s presidency during the Great Depression. Invested under Democratic presidents only, $10,000 would have grown to $300,671 at a compound rate of 8.9 percent over nearly 40 years.

http://www.nytimes.com/interactive/2008/...CHART.html

Question: How would the chart look if it evaluated who controlled congress?