Research on Freight Development of Guangdong Province Based on Grey Theory Model

Table 4

Actual value and forecast value of the freight development index in Guangdong Province (unit: million tons).

Year	Water freight volume (W)		Air cargo volume (A)		Pipeline freight volume (P)
	2013	688.51	688.51	2.12	2.12	76.81	76.81
2014	781.25	744.06	2.24	2.11	81.54	75.14
2015	780.93	802.20	2.28	2.28	76.93	79.29
2016	828.93	864.88	2.40	2.47	79.32	83.68
2017	939.04	932.46	2.45	2.67	82.09	88.31
2018	1023.51	1005.32	3.01	2.89	99.41	93.20
2019	1083.71	1083.88	3.017	3.12	98.99	98.35

Source: according to the calculation criteria.