Forecast of Freight Volume in Xi’an Based on Gray GM (1, 1) Model and Markov Forecasting Model

Table 1

Xi’an’s freight volume from 2000 to 2008.

Year	2000	2001	2002	2003	2004	2005	2006	2007	2009
Freight volume ()	0.6999	0.7728	0.9482	0.9392	1.4845	1.2051	1.1832	1.5124	2.7560