1925

7.6

1996

7.5

1998

6.8

2005

7.4

2007

7.2

1991

5.9

2007

5.7

1972

7.1

2003

7.1

2003

6.7

1957

8.1

2003

7.3

1952

7.4

2020

6.9

2003

6.7

2007

5.7

2002

6.7

2007

5.6

1999

6.8

1983

9.5