Jun-10

$3.43

$3.71

May-10

$3.59

$3.82

Apr-10

$3.92

$4.04

Mar-10

$3.95

$4.06

Feb-10

$3.88

$4.04

Jan-10

$3.84

$4.01

Dec-09

$4.00

$4.12

Nov-09

$4.00

$4.02

Oct-09

$4.05

$4.07

Sep-09

$4.08

$4.09

Aug-09

$3.94

$4.01

Jul-09

$3.64

$3.79

Jun-09

$3.37

$3.61

May-09

$3.23

$3.51

Apr-09

$3.26

$3.51

Mar-09

$3.04

$3.37

Feb-09

$2.91

$3.30

Jan-09

$3.18

$3.47

Dec-08

$3.34

$3.59

Nov-08

$3.25

$3.53

Oct-08

$3.58

$3.80

Sep-08

$3.85

$4.01

Aug-08

$4.12

$4.22

July-08

$3.93

$4.08

June-08

$3.94

$4.09

May-08

$4.48

$4.46

Apr-08

$4.51

$4.48

Mar-08

$4.48

$4.45

Feb-08

$4.76

$4.67

Jan-08

$4.98

$4.85

Dec-07

$5.61

$5.27

Nov-07

$5.71

$5.33

Oct-07

$5.38

$5.40

Sep-07

$6.14

$5.61

Aug-07

$5.97

$5.48

Jul-07

$5.81

$5.36

Jun-07

$5.99

$5.44

May-07

$6.17

$5.54

Apr-07

$6.11

$5.48

Mar-07

$5.98

$5.38

Feb-07

$5.93

$5.37

Jan-07

$5.92

$5.32

Dec-06

$5.68

$5.17

Nov-06

$5.51

$5.00

Oct-06

$5.39

$4.89

Sep-06

$5.20

$4.75

Aug-06

$5.37

$4.94

Jul-06

$5.14

$4.76

Jun-06

$5.24

$4.83

May-06

$5.22

$4.80

Apr-06

$5.36

$4.88

Mar-06

$5.24

$4.79

Feb-06

$5.20

$4.78

Jan-06

$5.12

$4.70

Dec-05

$5.07

$4.66

Nov-05

$5.01

$4.60

Oct-05

$4.98

$4.64

Sep-05

$5.05

$4.64

Aug-05

$4.85

$4.49

Jul-05

$4.79

$4.44

Jun-05

$4.65

$4.34

May-05

$4.48

$4.23

Apr-05

$4.36

$4.12

Mar-05

$4.53

$4.23

Feb-05

$4.71

$4.37

Jan-05

$4.73

$4.38

Dec-04

$4.64

$4.31

Nov-04

$4.47

$4.20

Oct-04

$4.34

$4.09

Sep-04

$4.20

$4.02

Aug-04

$4.12

$3.96

Jul-04

$4.03

$3.88

Jun-04

$4.09

$3.93

May-04

$3.98

$3.81

Apr-04

$3.94

$3.78

Mar-04

$4.00

$3.83

Feb-04

$4.03

$3.86

Jan-04

$3.98

$3.82

Dec-03

$3.96

$3.80

Nov-03

$3.90

$3.78

Oct-03

$3.91

$3.76

Sep-03

$3.91

$3.78

Aug-03

$3.96

$3.84

Jul-03

$3.92

$3.79

Jun-03

$3.88

$3.76

May-03

$3.77

$3.66

Apr-03

$3.71

$3.59

Mar-03

$3.58

$3.47

Feb-03

$3.57

$3.48

Jan-03

$3.69

$3.57

Dec-02

$3.79

$3.64

Nov-02

$3.85

$3.69

Oct-02

$3.90

$3.69

Sep-02

$3.92

$3.73

Aug-02

$4.16

$3.93

Jul-02

$4.16

$3.94

Jun-02

$4.15

$3.91

May-02

$4.32

$4.05

Apr-02

$4.23

$3.98

Mar-02

$4.25

$4.00

Feb-02

$4.42

$4.15

Jan-02

$4.45

$4.17

Dec-01

$4.28

$4.01

Nov-01

$4.18

$3.93

Oct-01

$4.06

$3.81

Sep-01

$3.66

$3.45

Aug-01

$4.32

$4.07

Jul-01

$4.06

$3.81

Jun-01

$4.06

$3.86

May-01

$4.00

$3.74

Apr-01

$3.85

$3.62

Mar-01

$3.62

$3.42

Feb-01

$3.82

$3.59

Jan-01

$3.78

$3.56

Dec-00

$3.71

$3.50

Nov-00

$3.73

$3.51

Oct-00

$3.61

$3.41

Sep-00

$3.51

$3.32

Aug-00

$3.60

$3.41

Jul-00

$3.55

$3.36

Jun-00

$3.52

$3.32

May-00

$3.35

$3.18

Apr-00

$3.34

$3.16

Mar-00

$3.25

$3.08

Feb-00

$3.29

$3.11

Jan-00

$3.38

$3.16