How can I have the statistics of my form?

Is it possible to get bounce rates for the forms?

I'm not sure if I understood your question, but I would recommend you to check these guides that may help you: 

https://www.jotform.com/help/293-How-to-View-All-Your-Form-Email-History

https://www.jotform.com/help/208-How-to-Prevent-Email-Bouncing-Related-Issues

https://www.jotform.com/help/262-How-to-Remove-Your-Email-Address-from-Bounce-List

You may also provide us more details about your questions, we will be happy to help you. 

Actually I meant a measurement of the amount of people who viewed a form, but left the page without filling out the form.

That will be possible with our form analytics tool, please take a look on this link for more details: https://www.jotform.com/form-analytics/