1990

7.8

2007

6.8

1994

6.6

1937

7.9

1972

6.4

1975

8.0

2006

7.8

2000

7.1

1967

7.5

2006

7.6

2017

1.0

2002

7.5

2003

7.8

1999

7.0

2005

7.8

1984

7.0

1930

7.2

1971

7.2

2001

6.0

1957

8.2