2005

7.4

1980

6.1

2004

5.7

2010

9.0

1984

6.9

1969

6.7

1988

6.5

2005

5.0

2004

7.3

1964

7.5

2002

6.5

2007

6.3

1959

6.3

2023

10.0

1996

6.1

1946

5.3

2000

5.8

1994

6.4

2006

6.6

2009

6.6