Microsoft Outlook 2011 - Recent Addresses Not Auto-populating

When composing a new email if I begin to type an email address or someones name in the 'To:" field it provides me with options for suggested contacts. My issue is that it DOES NOT show me recent email addresses I have clearly emailed recently. It shows contacts no problem. How can I see recent email addresses? I am using Mac OS Mavericks and Outlook 2011. I searched all the preferences and I cannot find it. Without having to add these recent email addresses to my contacts how can I just begin typing a recently email address and it auto-populates?

Thanks,

Charles