| Year | | 1-Jan-08 | | 30-Jun-08 | | | | 2000 | | | | 2001 | | | | 2002 | | | | 2003 | | | | 2004 | | | | 2005 | | | | 2006 | | | | | 2007 | | | | | 2008 | | | | | Average |
| | Index | | 4,331,535.70 | | 5,953,685.70 | | | | 150,455.70 | | 190,850.70 | | | 190,850.70 | | 253,595.70 | | | 253,595.70 | | 665,785.70 | | | 665,785.70 | | 859,510.70 | | | 859,510.70 | | 1,839,985.70 | | | 1,839,985.70 | | 2,924,810.70 | | | 2,924,810.70 | | 3,917,060.70 | | | 3,917,060.70 | | 4,331,535.70 | | | | 4,331,535.70 | | 5,930,385.70 | | | | | 8 Yr Avg |
| | % | | | | 37.44% | | | | 27.00% | | | | 33.00% | | | | 162.5% | | | | 29.0% | | | | 114.0% | | | | 58.95% | | | | 33.92% | | | | 10.58% | | | | | 36.9% | | | | | | 58.61% |
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