| Year | Season Best | Age | vs Prior Year | % Change | |
|---|---|---|---|---|---|
| 2007 | 47.72 | 29.1 | +0.44 | +0.91% | |
| 2006 | 48.16 | 28.0 | -0.73 | -1.54% | |
| 2005 | 47.43 | 27.3 | +0.25 | +0.52% | PB |
| 2004 | 47.68 | 26.2 | +1.20 | +2.45% | |
| 2003 | 48.88 | 25.3 | -1.31 | -2.75% | |
| 2002 | 47.57 | 24.3 | +0.87 | +1.80% | PB |
| 2001 | 48.44 | 23.2 | -0.40 | -0.83% | |
| 2000 | 48.04 | 22.4 | +nan | +nan% | PB |