1973

7.0

1993

6.7

1999

7.6

1980

7.3

1997

6.6

1953

5.5

2003

5.5

1998

7.1

1963

5.8

1984

7.1

2016

6.7

1940

6.5

2001

5.8

2006

5.2

2022

6.7

1984

6.8

1991

7.1

1972

6.7

2005

6.2

2004

6.3