1998

8.1

1996

7.0

2006

7.7

1982

8.9

2005

7.0

1947

6.5

1969

7.1

1984

7.5

1997

7.7

1989

6.1

1953

8.0

1974

8.6

2000

6.3

1995

6.0

2004

7.4

2005

6.1

1999

7.6

2025

0.0

2001

7.4

2003

6.3