1984

13.67

13.76

13.67

13.64

1985

13.67

13.77

13.68

13.65

1986

13.75

13.86

13.76

13.74

1987

13.90

13.98

13.89

13.87

1988

13.91

14.02

13.92

13.91

1989

13.81

13.92

13.82

13.79

1990

13.96

14.07

13.97

13.96

1991

13.90

14.01

13.91

13.89

1992

13.74

13.86

13.75

13.73

1993

13.80

13.91

13.80

13.78

1994

13.86

13.98

13.87

13.85

1995

13.98

14.11

14.00

14.00

1996

13.83

13.94

13.83

13.81

1997

14.03

14.13

14.01

14.01

1998

14.17

14.28

14.16

13.29

1999

13.96

14.11

13.99

13.33

2000

13.94

14.07

13.95

13.32

2001

14.08

14.21

14.08

13.22

2002

14.14

14.27

14.14

14.18

2003

14.16

14.28

14.15

14.18

2004

14.10

14.22

14.09

14.11

2005

14.19

14.34

14.20

14.24

2006

14.15

14.29

14.15

14.19

2007

14.14

14.31

14.17

14.21

2008

14.06

14.22

14.08

14.10

2009

14.16

14.30

14.15

14.18

2010

14.25

14.39

14.24

14.29

2011

14.09

14.26

14.10

14.13

2012

14.15

14.31

14.15

14.19

2013

14.19

14.35

14.19

14.23

2014

14.25

14.39

14.23

14.27

2015

14.45

14.59

14.42

14.50

2016

14.52

14.65

14.48

14.57

2017

14.43

14.58

14.41

14.48

2018

14.35

14.49

14.32

14.38

2019

14.47

14.61

14.43

14.51