2002

6.4

2006

7.2

1992

6.7

2001

6.9

1997

6.0

1963

6.7

1924

0.0

2004

7.1

2006

7.6

2005

6.2

1953

7.3

2010

8.2

2002

7.7

2001

5.3

1976

6.6

1965

6.8

2010

5.3

2017

6.6

1960

7.0

2007

0.0