2005

7.1

2003

6.9

1990

7.0

2004

6.1

1967

6.9

2007

6.1

2002

5.1

1977

6.8

1985

6.2

1996

7.0

2019

4.6

1977

6.0

2006

6.0

2008

6.2

2020

5.5

1996

7.1

2006

7.1

1992

6.7

2001

6.2

1985

6.7