1957

7.8

1974

7.9

1998

6.9

1925

8.0

1931

7.1

2006

7.0

2001

7.4

2007

2.2

1995

6.4

2005

7.1

1989

0.0

2018

6.9

2017

5.5

1993

7.4

2003

5.8

1988

4.9

1952

7.4

2012

9.1

1930

7.2

1990

5.0