1961

7.3

2005

6.9

1955

7.3

1956

7.1

1957

7.2

2000

7.4

1999

8.5

1938

4.0

1999

7.7

2002

8.4

1993

8.6

2017

6.9

2005

7.5

1987

7.6

1990

8.5

1979

6.9

1983

6.0

0.0

2018

8.0

1996

6.6