Table 1. International tourist arrivals in Xi’an from 1980–2018 (Unit: ten thousand). The data from 1980 to 2013 are used as the training set and the data from 2014 to 2018 are the test set.
| Year | Arrivals |
|---|---|
| 1980 | 4 |
| 1981 | 6.71 |
| 1982 | 9.09 |
| 1983 | 12.38 |
| 1984 | 15.13 |
| 1985 | 21.15 |
| 1986 | 25.78 |
| 1987 | 30.15 |
| 1988 | 36.58 |
| 1989 | 21.2 |
| 1990 | 25.88 |
| 1991 | 31 |
| 1992 | 40.16 |
| 1993 | 43.5 |
| 1994 | 41.49 |
| 1995 | 41.35 |
| 1996 | 45.39 |
| 1997 | 48.53 |
| 1998 | 47.98 |
| 1999 | 55.41 |
| 2000 | 65.03 |
| 2001 | 67.2 |
| 2002 | 74.13 |
| 2003 | 33.66 |
| 2004 | 65.03 |
| 2005 | 77.56 |
| 2006 | 86.73 |
| 2007 | 100.01 |
| 2008 | 63.2 |
| 2009 | 67.29 |
| 2010 | 84.18 |
| 2011 | 100.23 |
| 2012 | 115.35 |
| 2013 | 121.11 |