2006

6.5

2000

4.4

1976

5.6

1989

6.8

1946

5.3

1988

6.7

2003

6.0

1998

7.5

1926

7.9

1994

6.7

1979

7.5

2004

6.0

1968

6.6

2020

5.7

2005

6.2

1974

7.1

2002

7.6

2007

5.4

2002

6.7

1999

6.5