1997

7.4

2003

7.8

1971

6.4

1997

7.6

1972

4.8

1975

3.0

1932

7.5

1975

7.8

2002

7.2

2005

7.0

1968

7.1

2014

6.6

2017

6.5

2023

7.2

1972

6.0

1996

7.9

1995

7.0

2002

6.5

2012

7.0

1983

5.8