These charts are great!

I would love an option on Pie Charts to add a pie slice percentage to each slice's label. Since I'm using data scaling, the percentages are not obvious and yes, I know I could write some code to calculate them and then add them to to labels myself when sending the data across to Google, but these charts are so simple and easy to use, it would be more elegant if it were part of the API. If a user wanted the option to see the percentage at the end of each label, he could pass a parameter that would define the number of decimal places.

chpct=0 => Apples 23% chpct=2 => Oranges 19.41%

This could be used for other chart types as well.