I have a bunch of chronological data about people occupying various leadership positions in an organization. What I'd like to create is a chart where each "bar" corresponds to a position and the "pieces" that are stacked in that bar represent the tenures of the individuals who have occupied the position. There are 5 positions we're interested in, so there should be 5 bars. I'm sure this is a simple matter of formatting the data correctly, but so far on this Monday I've been unable to hit on an easy method.

The data looks something like this:

Position 1 Start Date Duration
Padding 9 March 1946 566
Bob 26 Sep 1947 216
Chuck 30 Apr 1948 1886
Tom 30 Jun 1953 1461
etc etc etc

Position 2 Start Date Duration
Padding 9 March 1946 558
Bill 18 Sep 1947 949
Sam 24 Apr 1950 1002
Joe 4 Feb 1953 920
etc etc etc

The padding entry is just to provide a common start to all the positional series....9 March 1946 is the earliest start date from the 6 series.

If this isn't clear please let me know and I can try to elaborate.

Thanks!