For more details, follow this link - [adwords.google.com...]
Thank you for your reply.
On the link that you gave me, it states:
Therefore, borderline keywords slightly below our minimum clickthrough rate (CTR) of 0.5% may accrue at least 1000 impressions or more, depending on their actual performance.
Does that also count for
Search Total and Content Total
Visit the Library [webmasterworld.com]. For AdWords optimization techniques. Hope this helps!