Historical data for success rate of grant/project applications? Is there any publicly accessible information regarding the success rate of grant/project applications for science/technology and other research grant programs (e.g. NSF grants) and its variation over time?

I'm not interested in an exhaustive list but some illustrative examples would be much appreciated.
Check out the NIH Research Portfolio Online Reporting Tools. It may take you some time to find exactly what you're looking for, but there are numerous reports available, with a good deal of detail.