1977

7.3

1984

2.5

1957

7.2

2006

7.0

1985

7.4

2012

6.1

2003

8.7

1902

7.9

1994

7.3

1989

7.8

1966

6.6

1949

5.9

2017

7.9

1995

7.7

1980

7.0

1923

7.7

2005

7.1

2001

6.9

1999

5.7

2007

6.6