Mike Pulsifer found a chart that does not make all starting years zero, here is what happened:
Finally, interactive data visualization tools can add another dimension to adoption curves. See this example of a chart that shows how many years it takes to transform a startup into a large company (thank you Michael Eisenberg). The opening chart is far too busy to show in a PowerPoint presentation, but that's not the objective here. These charts are designed for pondering over: select and de-select lines, mouse-over data, etc. If you had to translate this chart into PowerPoint, you would have to use a number of slides to highlight the messages you want to stand out.