1961

7.5

1986

7.7

1930

7.8

1957

8.3

1985

5.3

2017

6.0

2002

5.8

1990

6.7

2005

6.6

1939

7.0

2002

7.1

2002

6.4

2008

6.4

1969

6.7

2018

7.9

1976

6.4

2006

5.2

1994

6.1

1960

6.2

1989

6.0