2008

5.3

1990

5.8

2005

6.2

1994

7.1

2008

6.5

2006

6.5

2002

4.8

1994

6.2

2008

6.2

1980

6.3

1963

7.0

1977

7.0

2003

7.1

1988

7.1

2001

6.6

1987

6.8

2019

5.7

1987

7.3

2003

7.2

2014

5.4