Yes
No
Assuming the same geographic segmentation for Facebook users in September 2009 as in December 2011, the number of users in Asia in September 2009 exceeded 50 million.
The number of Facebook users increased between December 2011 and the time of the IPO in May of 2012.
The total number of users in all regions in the "Regions" tab matches the number of active users in December 31, 2011 shown in the "User Growth" tab.