Table 2. The monthly status of slaughter and carcass grades of commercial pigs in 2017

Month1)	n	Carcass weight (kg)	Backfat thickness (mm)	Grades (%)
				1+	1	2
January	48,616	88.07±6.20e	21.73±4.85de	31.43	40.62	27.43
February	47,095	88.92±6.24a	22.01±4.74bc	32.45	39.71	27.23
March	54,740	88.15±6.02d	22.09±4.76bc	33.35	37.81	28.33
April	49,383	87.89±5.74f	22.10±4.67bc	37.05	35.86	26.60
May	51,860	88.53±6.02c	21.90±4.69cd	36.15	36.80	26.54
June	50,821	87.53±5.73g	22.23±4.68ab	34.05	38.49	27.02
July	33,418	86.18±5.41i	22.07±4.52bc	32.88	40.17	26.58
August	51,182	86.00±5.52j	21.69±4.58de	33.66	39.35	26.54
September	60,299	86.21±5.89i	21.53±4.63e	32.80	39.12	27.68
October	42,385	88.64±6.47b	22.18±4.48ab	33.38	38.35	27.53
November	63,049	87.42±6.15h	22.21±4.51ab	34.50	37.49	27.43
December	51,075	87.92±6.15f	22.38±4.50a	33.71	38.87	26.80

Means with different superscription within the same column differ (p<0.05).
Jan, midwinter; Feb, late winter; Mar, early spring; Apr, midspring; May, late spring; Jun, early summer; Jul, midsummer; Aug, late summer; Sep, early fall; Oct, midfall; Nov, late fall; Dec, early winter.