| Year | East (12) | North (242) | North (276) | West (54) | West (57) |
|---|---|---|---|---|---|
| 1992 | 0.036 | 0.024 | 0.105 | ||
| 1993 | 0.033 | 0.025 | 0.103 | ||
| 1994 | 0.033 | 0.026 | 0.09 | ||
| 1995 | 0.049 | 0.023 | 0.085 | ||
| 1996 | 0.034 | 0.022 | 0.077 | ||
| 1997 | 0.05 | 0.024 | 0.075 | ||
| 1998 | 0.036 | 0.023 | 0.071 | ||
| 1999 | 0.037 | 0.026 | 0.067 | ||
| 2000 | 0.043 | 0.023 | 0.067 | ||
| 2001 | 0.043 | 0.023 | 0.067 | ||
| 2002 | 0.036 | 0.026 | 0.066 | ||
| 2003 | 0.03 | 0.023 | 0.068 | ||
| 2004 | 0.03 | 0.021 | 0.069 | ||
| 2005 | 0.035 | 0.024 | 0.053 | ||
| 2006 | 0.039 | 0.022 | 0.054 | ||
| 2007 | 0.03 | 0.021 | 0.048 | ||
| 2008 | 0.033 | 0.022 | 0.056 | ||
| 2009 | 0.036 | 0.023 | 0.056 | ||
| 2010 | 0.034 | 0.022 | 0.047 | ||
| 2011 | 0.036 | 0.022 | 0.047 | ||
| 2012 | 0.026 | 0.022 | 0.047 |