2008

6.5

2001

5.9

2017

6.1

1988

7.8

1999

7.4

1937

5.9

2001

6.6

1999

6.5

1997

6.5

1999

6.1

1982

6.6

1968

6.3

2004

6.4

2005

6.8

2003

5.5

2014

5.6

1998

7.0

1993

6.5

2006

6.5

1999

6.8