1973

5.2

2011

6.0

2003

5.8

1977

7.1

1986

7.3

2007

6.3

1963

7.4

1983

7.2

1996

6.6

1932

7.0

2007

6.5

2016

6.5

1968

7.3

1995

5.9

2023

1.0

1997

3.0

1958

5.9

1976

2.5

1992

6.2

1986

6.4