2000

7.2

2011

7.2

1972

4.0

2004

6.4

1994

7.3

1983

6.1

2007

7.9

1974

8.6

2006

5.5

2006

6.6

2010

9.1

1977

7.1

2007

5.7

2001

6.4

1927

7.3

1989

5.1

1895

5.4

1997

7.0

1980

6.0