09/01/2008

44.4%

$133.44

July 2008

08/01/2008

44.4%

$133.93

June 2008

07/01/2008

41.2%

$125.39

May 2008

06/01/2008

36.0%

$112.57

April 2008

05/01/2008

33.2%

$105.56

March 2008

04/01/2008

29.2%

$95.35

February 2008

03/01/2008

28.0%

$92.95

January 2008

02/01/2008

27.6%

$91.37

December 2007

01/01/2008

28.8%

$94.62

November 2007

12/01/2007

25.2%

$85.93

October 2007

11/01/2007

22.8%

$79.93

September 2007

10/01/2007

20.0%

$72.39

August 2007

09/01/2007

20.8%

$74.15

July 2007

08/01/2007

18.0%

$67.48

June 2007

07/01/2007

16.4%

$63.46

May 2007

06/01/2007

16.4%

$63.96

April 2007

5/1/2007

15.5%

$60.56

Mar-2007

4/1/2007

14.80%

$59.26

Feb-07

3/1/2007

12.80%

$54.24

Jan-07

2/1/2007

16.00%

$62.03

Dec-06

1/1/2007

14.80%

$59.37

Nov-06

12/1/2006

14.40%

$58.88

Oct-06

11/1/2006

16.40%

$63.87

Sep-06

10/1/2006

20.40%

$73.05

Aug-06

9/1/2006

20.80%

$74.41

Jul-06

8/1/2006

19.20%

$70.96

Jun-06

7/1/2006

19.20%

$70.94

May-06

6/1/2006

18.80%

$69.69

Apr-06

5/1/2006

16.00%

$62.90

Mar-06

4/1/2006

15.60%

$61.63

Feb-06

3/1/2006

17.20%

$65.51

Jan-06

2/1/2006

14.80%

$59.43

Dec-05

1/1/2006

14.40%

$58.30

Nov-05

12/1/2005

16.00%

$62.37

Oct-05

11/1/2005

17.20%

$65.57

Sep-05

10/1/2005

16.80%

$64.97

Aug-05

9/1/2005

14.40%

$58.70

Jul-05

8/1/2005

13.60%

$56.31

Jun-05

7/1/2005

10.80%

$49.83

May-05

6/1/2005

12.40%

$53.04

Apr-05

5/1/2005

12.80%

$54.22

Mar-05

4/1/2005

10.00%

$47.97

Feb-05

3/1/2005

9.60%

$46.84

Jan-05

2/1/2005

8.40%

$43.33

Dec-04

1/1/2005

10.40%

$48.46

Nov-04

12/1/2004

12.40%

$53.13

Oct-04

11/1/2004

9.20%

$45.95

Sep-04

10/1/2004

8.80%

$44.94

Aug-04

9/1/2004

7.20%

$40.81

Jul-04

8/1/2004

6.40%

$38.04

Jun-04

7/1/2004

7.20%

$40.29

May-04

6/1/2004

5.60%

$36.70

Apr-04

5/1/2004

5.60%

$36.76

Mar-04

4/1/2004

4.80%

$34.74

Feb-04

3/1/2004

4.80%

$34.27

Jan-04

2/1/2004

4.00%

$32.15

Dec-03

1/1/2004

3.60%

$31.10

Nov-03