UnhandledExceptionCount resource measure for sandbox solution does not increase
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I built a webpart in sandbox solution.  On click of button I am throwing an exception and not catching it.

I added the web part in a page.  On using the page and clicking the button, I expected UnhandledExceptionCount resource to be increasing for this sandbox solution.
However I do not see the number increasing.

Am I missing something here.  Is it because I clicked the button about 10-20 times and that is not enough ?
Also can I download the webpart using a powershell to generate load?  Can someone help me with the powershell script for the same.