In a 2007 study, Alex Brill and Kevin Hassett of the American Enterprise Institute found that the revenue-maximizing corporate tax rate is about 25 percent (click chart to enlarge).

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The following chart shows the percent of web traffic generated from tablets.

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This chart shows the percent change, not the actual number.

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Boston.com put together the following chart, which shows the percent of questions asked by Twitter users and White House journalists that mention selected topics.

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When I consulted my 60-year chart on LIBOR I drew a trendline through 4 percent.

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The probability of default for retailers improved to 3.63 percent from 3.95 percent, while improvements for the other industries were less noticeable (see chart).

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As you can see in the chart below, the Eastern European Fund (EUROX) rose nearly 10 percent over the same time frame.

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The challenge that many companies have when attempting to create a data driven culture is that the glamorous part, the chart and graph at the end of the process, is really about 10 percent or less of the work.

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As the next chart shows, the total deficit reduction that we have accomplished since 1993 has come 52 percent from spending, and 48 percent from revenues.

WHITEHOUSE: Franklin D. Raines Testimony to House Budget Committee, 02/03/1998 | The White House

And this certainly is consistent with the data in the chart, which show that the poverty rate no longer is falling and instead bumps around between 12 percent and 15 percent.

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