Carlos Castro suggested that it would be helpful to see what ImageScore was required in order to get an award (instead of having to do the math).  Thanks for asking Carlos.  The simple answer to this questions is:

To be included in the Top 5% it takes an ImageScore of about 640 and the Top 10% and 20% come it at around 615 and 580 respectively.

This changes from week to week and category to category but should give you a sense of where your images are trending.

Here is full analysis by category: