1961

6.0

1988

6.3

1986

6.7

1975

6.8

2004

5.8

1968

6.6

1995

7.3

1974

7.1

2007

0.0

1992

7.0

1989

6.6

2021

3.3

1990

7.5

2022

7.3

1999

7.3

1960

8.0

2005

6.4

1985

7.1

1914

1.0

1994

6.4