1974

6.7

2009

6.6

2001

4.3

1963

7.9

1924

7.8

1965

8.1

1973

7.1

2005

6.9

1992

6.4

1929

6.7

1994

6.0

2010

7.1

2010

6.6

2011

5.5

1943

4.8

2013

6.8

1942

4.3

1958

2.0

1934

0.0

2010

6.4