This post uses this example to illustrate bar charts and pie charts.
When Apple Computer introduced the iMac computer in August 1998, the company wanted to learn whether the iMac was expanding Apple’s market share. Was the iMac just attracting previous Macintosh owners? Or was it purchased by newcomers to the computer market and by previous Windows users who were switching over? To find out, 500 iMac customers were interviewed. Each customer was categorized as a previous Macintosh owner, a previous Windows owner, or a new computer purchaser.
And then gives this table
I did hear about the interview somewhere else, but I cannot find the original data (by googling "500 apple imac customers interview" and various combinations of the keywords).
That post does not give the source where the data comes from.
Is the data available somewhere?