1988

5.7

2021

6.1

1988

5.2

2019

6.7

1986

6.6

1989

5.5

1968

6.8

1952

7.7

1940

6.2

1980

6.4

1998

6.0

1982

5.9

1995

5.6

1992

7.4

1978

5.9

1985

6.2

2005

5.2

1965

6.8

1985

8.3

1987

5.5