2002

6.3

2005

7.5

2001

6.6

1998

7.4

1996

4.0

2014

8.3

2023

6.7

1971

7.8

1975

7.3

1976

5.0

1951

7.9

2007

8.0

2014

7.8

2000

7.5

2007

8.2

1989

8.3

2012

7.6

2009

6.8

1978

7.2

1994

7.3