2001

7.8

1952

6.6

1947

4.8

1953

6.1

1955

5.7

2010

3.5

1936

3.0

1956

5.1

1985

6.1

1974

4.5

2001

6.8

1991

6.4

1948

5.9

2004

6.0

2003

6.2

1996

6.6

2006

6.2

2002

5.0

2005

6.9

1945

7.4