1929

5.7

1939

5.6

1933

6.9

2002

5.7

1928

7.1

1982

6.8

2017

6.1

1955

6.2

1976

5.7

1982

6.5

1994

7.5

1952

8.2

2005

5.0

1992

7.2

1999

6.2

2003

5.2

1988

6.6

1984

5.6

2004

5.7

1987

7.3