Diane, I know what you mean, but unfortunately statistically you can't actually say the bulge represents the baby boomers. This is because the poll asks when you first bought. This would include all dates from 1991 through 2001, a ten year stretch. Thus for every age posted, their current age is that age + anything up to an additional 10 years.
In my case when we bought I was in the 46-50 group, but now I'm closer to 60. I was born before the baby boomers (officially), even though my vote contributed to the 'bulge' in the data.
One thing you can probably safely deduce (based on incomes, etc), is that the 20 somethings year old group did <u>not</u> in general, purchase in 1991. Because of this, the data has a natural bias toward the middle age years.
Isn't statistics fun?
There are some conclusions one could probably deduce. If you compared this distribution to an age vs. income distribution, and an age vs. children (and children't ages) you would probably find most purchased about the time their disposable income had risen to a certain point, and perhaps also that their children were still at home and at an age where they would be doing Disney as a family for several years to come.
Since I haven't actually compared the above distributions, the above 'conclusions' are actually an estimated opinion.
In any case, when we bought it was with almost 50 years of Disney before us. And at this point we've still got 40 more to go.