2004

6.8

1988

7.5

2005

7.4

2004

8.0

2021

7.2

1983

7.3

2006

7.0

1988

7.0

1988

6.9

2008

6.3

2007

5.2

2003

6.7

2005

7.3

1957

5.7

2005

6.0

1999

6.5

1992

6.5

1979

7.1

1996

5.9

2021

5.2