Ozone holes and environmental regulation

This year's ozone hole is the largest ever. But yet, ozone depleting CFC's have been banned worldwide for years. That bit of environmental regulation is often touted as a victory for environmentalism. But yet, the ozone hole continues to grow despite the ban. Here are the images from NASA, You can see for yourself:
This is what it looked like on October 21, 2004


This is what it looked like on October 21, 2005



And finally on October 21, 2006



I certainly see a pattern here but it is not the one we were led to expect by the global climatologists. If they can't predict this, what makes anyone think they can predict anything else with any precision?