Contacts in Outlook 2013

I have upgraded to Outlook 2013 from Outlook 2010, In Outlook 2010, I have ~100 contacts plus a few group list. Since moving to Outlook 2013, all of my contact are missing. So short of going back to Office 2010 and/or restoring Windows 7. How can I access the contacts from my Outlook 2010 PST?

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