1991

5.6

1980

6.5

1995

5.6

1987

5.2

1988

6.5

1989

5.5

1995

4.6

1959

6.1

1988

6.2

1954

6.7

1989

6.2

1993

6.5

2021

6.1

1996

5.8

2005

5.2

2007

5.5

1933

6.2

2001

6.4

2006

6.7

1993

6.9