| 年份 | 实际值/万m3 | GM(1,1)模型 | 改进GM(1,1)模型 | ||
| 模型值/万m3 | 相对误差/% | 模型值/万m3 | 相对误差/% | ||
| 2003 | 170,112 | 170,112 | 0 | 170,112 | 0 |
| 2004 | 133,158 | 121,349.9 | 8.87% | 138,082 | 3.70% |
| 2005 | 152,367.05 | 164,729.8 | 8.11% | 161,037 | 5.69% |
| 2006 | 186,598.38 | 198,754.6 | 6.51% | 193,287 | 3.58% |
| 2007 | 166,140.77 | 175,004.5 | 5.34% | 168,988 | 1.71% |
| 2008 | 169,104.1 | 169,510.0 | 0.24% | 170,427 | 0.78% |
| 2009 | 165,583.6 | 156,828.0 | 5.29% | 161,529 | 2.45% |
| 2010 | 161,156 | 147,968.1 | 8.18% | 151,844 | 5.78% |
| 2011 | 157,188 | 149,342.4 | 4.99% | 151,071 | 3.89% |
| 2012 | 149,602 | 165,619.0 | 10.71% | 155,734 | 4.10% |