In 2012, who had the least consumption in LAM?
Year 2012 can be presented as Between 201201 And 201212, which means between January and December in 2012
SELECT T1.CustomerID FROM customers AS T1 INNER JOIN yearmonth AS T2 ON T1.CustomerID = T2.CustomerID WHERE T1.Segment = 'LAM' AND T2.date BETWEEN 201201 AND 201212 GROUP BY T1.CustomerID ORDER BY SUM(T2.Consumption) ASC LIMIT 1