2006

5.3

2009

4.5

2003

6.1

2012

9.3

1990

6.0

1973

7.5

2005

7.4

1998

6.0

2010

5.8

2003

5.9

2006

6.9

2008

5.5

2012

7.2

1890

4.9

1982

6.7

1999

5.3

2013

8.6

1976

5.2

1991

6.8

2007

7.2