Standard ROI For HU SNG's

Just curious as to what a typical ROI would be for Heads up SNG's for the following buy-in ranges:

$5-$10ish

$10-$20ish

$20-$60ish

$60-$100ish

$100+

It's not like I need to know really for the bigger games, as I can pretty much assume ROI will be lower at $100 than $10. I'm sure everyone will have different answers, but just looking to see general opinions for the most part.

Thanks,

Micro.

Not sure... i think for the lower buyins it's closer to 10% and for the higher ones its closer to 5%