1994

6.8

2006

5.9

1956

4.8

2003

5.8

1979

6.9

2009

6.0

2000

7.1

2007

6.2

1957

6.4

1935

7.3

2006

6.0

1932

7.4

2004

6.2

2005

6.4

1980

5.3

1963

7.1

1979

6.2

1989

7.8

2000

6.4

1983

4.1