2007

6.5

2004

7.5

2005

6.4

2004

6.3

1995

7.3

1994

7.4

2001

6.7

2020

6.7

1995

5.2

2010

5.6

1995

6.3

2005

5.7

2019

6.2

2010

6.3

2001

5.8

1998

6.7

1996

5.2

2001

6.6

1988

7.0

1974

4.2