| East (294) North (202) South (25) Southeast (85) West (621) | Georegion | year | East (294) | North (202) | South (25) | Southeast (85) | West (621) |
|---|---|---|---|---|---|---|---|
| 1992 | 2.2473 | 0.5379 | 1.0062 | 2.5147 | 3.6878 | ||
| 1993 | 2.088 | 0.4809 | 1.1852 | 1.8563 | 3.6898 | ||
| 1994 | 2.1694 | 0.4525 | 1.1853 | 2.1179 | 3.5807 | ||
| 1995 | 2.2037 | 0.4856 | 1.2105 | 2.2468 | 3.4232 | ||
| 1996 | 2.2099 | 0.5533 | 1.6679 | 2.915 | 3.5153 | ||
| 1997 | 2.0987 | 0.4776 | 1.7047 | 2.4593 | 3.4596 | ||
| 1998 | 2.2181 | 0.5264 | 1.7934 | 1.9561 | 3.6513 | ||
| 1999 | 2.0575 | 0.4407 | 1.5296 | 1.9146 | 3.4351 | ||
| 2000 | 2.013 | 0.5027 | 1.4029 | 2.1105 | 3.3309 | ||
| 2001 | 2.0568 | 0.468 | 1.5819 | 1.8521 | 3.2385 | ||
| 2002 | 2.0188 | 0.4209 | 1.4012 | 1.6388 | 3.1804 | ||
| 2003 | 1.8647 | 0.4737 | 1.7821 | 1.8375 | 3.0781 | ||
| 2004 | 2.0307 | 0.4921 | 1.4965 | 1.7856 | 3.3575 | ||
| 2005 | 1.9209 | 0.4168 | 1.5863 | 1.6863 | 3.137 | ||
| 2006 | 1.9753 | 0.4794 | 1.4706 | 1.9191 | 3.318 | ||
| 2007 | 2.1637 | 0.4495 | 1.7455 | 1.5965 | 3.1712 | ||
| 2008 | 2.0067 | 0.4214 | 1.772 | 1.3688 | 3.0598 | ||
| 2009 | 1.935 | 0.3453 | 1.772 | 1.2244 | 2.9348 | ||
| 2010 | 1.9429 | 0.4027 | 1.772 | 1.4249 | 3.0785 | ||
| 2011 | 1.9468 | 0.4405 | 1.772 | 1.4798 | 2.9058 |