+----------+----------+
| month_id | count(*) |
+----------+----------+
|        1 |     1074 | 
|        3 |       97 | 
|        4 |  7291954 | 
|        5 |       40 | 
|        6 |       27 | 
+----------+----------+
5 rows in set (24.05 sec)

+----------+----------+
| month_id | count(*) |
+----------+----------+
|        1 |   380245 | 
|        3 |    26429 | 
|        4 |  8846739 | 
|        5 |    24424 | 
|        6 |    11551 | 
+----------+----------+
5 rows in set (29.36 sec)