1962

6.9

1964

7.1

1990

6.1

1974

7.0

1965

6.0

1958

7.1

2009

6.9

1971

6.8

1972

7.2

1988

7.0

2006

5.4

1943

7.5

1989

6.2

2016

7.9

1972

6.9

1932

7.8

1995

7.3

2013

6.1

1957

7.6

2022

5.8