1987

5.5

1999

6.5

1990

6.5

2016

6.7

2005

6.2

2021

7.9

1941

7.0

2017

7.7

1998

5.1

1950

7.6

2021

5.9

1991

5.3

1995

6.2

2002

5.3

1982

5.2

1980

5.8

1996

6.7

1994

5.6

1955

7.2

2021

6.0