1984

4.6

2007

6.0

1967

7.3

1996

6.5

1959

7.9

1997

7.4

1995

7.7

1993

7.4

2003

6.1

2002

7.0

2000

6.3

2005

7.0

2014

0.0

1978

6.3

1928

8.0

1999

7.1

1968

7.8

2004

6.5

2000

8.1

2023

6.4