1997

6.8

2003

7.1

2000

7.3

2019

6.8

1972

6.8

1983

7.3

1994

7.0

1923

7.5

1960

7.5

1977

7.3

1993

7.8

1996

7.6

2018

5.8

1995

7.2

1987

6.1

1985

7.0

1988

6.6

1944

5.5

2007

3.1

2001

6.1