3/7/1975

23.8

5/2/2010

22.22

1/24/2002

21.08

3/17/2002

20.6

2/5/2004

19.69

1/23/2006

19.52

2/23/2019

18.82

5/6/2003

18.32

2/15/2003

16.5

3/31/2002

16.2

12/1/2004

15.76