Container Throughput Forecasting of Tianjin-Hebei Port Group Based on Grey Combination Model

Table 7

The forecasting data of the first step using the optimized FGM (1, 1) model (unit: 10,000 TEU).

Year	Tian. r = 1	Tian. norm.	Tang. r = 0.2	Tang. norm.	Qin. r = 0.2	Qin. norm.	Huang. r = 0.2	Huang. norm.	Total r = 0.8	Total norm.
2015	1411.00	0.01	152.00	0.01	50.00	0.01	50.00	0.01	1663	0.01
2016	1432.00	0.03	205.99	0.23	52.15	0.08	59.50	0.32	1764.71	0.08
2017	1522.00	0.11	246.88	0.39	55.74	0.20	66.00	0.54	1882.89	0.15
2018	1618.00	0.20	276.80	0.51	58.64	0.30	69.81	0.66	2008.98	0.23
2019	1721.00	0.29	298.48	0.59	60.74	0.36	71.77	0.73	2143.51	0.32
2020	1829.00	0.39	313.97	0.66	62.18	0.41	72.54	0.75	2287.06	0.41
2021	1945.00	0.50	324.76	0.70	63.08	0.44	72.52	0.75	2440.22	0.51
2022	2068.00	0.61	331.97	0.73	63.58	0.46	72.03	0.74	2603.63	0.62
2023	2198.00	0.73	336.47	0.75	63.76	0.46	71.23	0.71	2777.99	0.73
2024	2337.00	0.85	338.90	0.76	63.71	0.46	70.28	0.68	2964.02	0.85
2025	2485.00	0.99	339.76	0.76	63.48	0.45	69.24	0.64	3162.51	0.98
MAPE	0.856%%		3.448%		0.835%		1.714%		0.323%