年份

拟合方程

q值

R²

1999

y = −0.9854x + 8.8909

0.9845

0.8484

2000

y = −0.9826x + 8.9081

0.9826

0.8559

2001

y = −0.9905x + 8.8352

0.9905

0.9039

2002

y = −1.0049x + 8.8713

1.0049

0.9155

2003

y = −0.9910x + 8.7484

0.9910

0.9342

2004

y = −0.9808x + 8.7041

0.9808

0.9389

2005

y = −0.9836x + 8.7434

0.9836

0.9445

2006

y = −0.9635x + 8.5630

0.9635

0.9412

2007

y = −0.9518x + 8.5172

0.9518

0.9462

2008

y = −0.9399x + 8.4636

0.9399

0.9447

2009

y = −0.9385x + 8.4755

0.9385

0.9429