first, exploits and vulnerabilities are different if related things. If you're showing links to CVEs, I'm guessing you meant vulnerabilities not exploits.

The number of reported vulnerabilities does not have a strong correlation at all to how vulnerable something actually is. People pay hundreds of thousands of dollars for apple bugs; indeed apple does. Based on the above data, I'd even suggest that it "proves" iOS is significantly more secure. The bounties available for Linux are minuscule.