2003

8.5

2015

6.3

1933

7.6

2005

6.9

2002

7.4

2007

6.5

2003

6.7

1993

8.0

1997

6.5

2008

7.0

2003

6.3

2005

6.3

2009

3.1

1967

6.2

2000

6.2

2016

6.1

1966

6.5

1984

6.1

2007

0.0

2017

5.4