Max value of Static Content Compression in IIS ?

Question

Hi Guys,

Just wondering how to set Cache Control as cacheControlMaxAge="31536000" ? Unsure how to get this using IIS ?

<configuration>
  <system.webServer>
    <staticContent>
      <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="00:00:15" />
    </staticContent>
  </system.webServer>
</configuration>

Thx