Question: What is the name of the branch with the greatest amount of memberships that were registered in the year 2016?
SQL: SELECT T2.name FROM membership_register_branch AS T1 JOIN branch AS T2 ON T1.branch_id   =   T2.branch_id WHERE T1.register_year   =   2016 GROUP BY T2.branch_id ORDER BY count ( * )  DESC LIMIT 1