.
month_4 109675 non-null uint8 46 month_5 109675 non-null uint8 47 month_6 109675 non-null uint8 48 month_7 109675 non-null uint8 49 month_8 109675 non-null uint8 50 month_9 109675 non-null uint8 51 month_10 109675 non-null uint8 52 month_11 109675 non-null uint8 53 month_12 109675 non-null uint8 54