1992

16.95

19.33

0.88

1992

1.29

21.26

0.06

1993

14.77

20.37

0.73

1993

1.86

21.28

0.09

1994

15.94

20.40

0.78

1994

1.16

20.02

0.06

1995

16.41

19.88

0.83

1995

2.48

21.22

0.12

1996

16.74

20.10

0.83

1996

3.37

21.13

0.16

1997

16.24

19.75

0.82

1997

3.75

20.03

0.19

1998

15.33

19.87

0.77

1998

1.89

18.69

0.10

1999

15.06

19.71

0.76

1999

4.81

19.68

0.24

2000

14.12

19.54

0.72

2000

5.88

23.37

0.25

2001

14.24

19.81

0.72

2001

5.18

20.49

0.25

2002

14.63

19.39

0.75

2002

4.29

19.65

0.22

2003

13.38

19.76

0.68

2003

4.30

19.19

0.22

2004

14.19

19.48

0.73

2004

4.21

19.61

0.21

2005

13.88

19.32

0.72

2005

5.92

19.92

0.30

2006

14.65

19.66

0.75

2006

5.97

19.78

0.30

2007

15.06

20.10

0.75

2007

5.64

19.13

0.29

2008

14.99

19.99

0.75

2008

5.40

19.92

0.27

2009

16.48

19.74

0.83

2009

6.82

19.74

0.35

2010

15.65

19.45

0.80

2010

7.90

19.95

0.40

2011

12.33

19.48

0.63

2011

7.77

20.01

0.39

2012

16.18

20.26

0.80

2012

7.70

20.07

0.38

2013

15.59

20.67

0.75

2013

6.95

19.71

0.35

2014

14.74

20.84

0.71

2014

8.78

19.56

0.45

2015

15.08

19.91

0.76

2015

10.02

19.38

0.52

2016

15.55

20.59

0.76

2016

9.15

20.10

0.46

2017

15.39

19.94

0.77

2017

9.18

19.60

0.47

Ave.

15.20

19.89

0.76

Ave.

5.32

20.15

0.27