Apparently more than you realize! According to an article I read on Yahoo!, Americans are ingesting 22 teaspoons of the stuff each day. That equates to 355 calories each day of empty calories. No wonder Americans are overweight! It turns out that we drink most of that sugar in the form of soda, but we are also not aware of the added sugar in most foods. Keep in mind that these numbers do not include natural sugars found in foods like fruit.
I guess this just points out the need to eat less processed foods, which is virtually impossible in today's world. Who has time to make everything from scratch? Plus it's easy to see why the poor inner city and rural kids have such issues with weight because this is all they eat. Those kids and their families simply don't have access to the resources those of us in the 'burbs do. Something definitely needs to change here.
In the end, we're either going to have to change our palates or start exercising more, but probably a combination of both (and start providing better choices to kids everywhere, not just the well-off ones). Phew!