2006

6.5

1987

6.6

1994

5.9

1999

6.5

2017

3.8

2009

6.8

2008

6.7

1992

6.0

1930

4.1

1997

5.6

1986

7.4

1996

5.3

2004

5.5

2002

6.5

1988

7.0

1989

7.1

2003

6.5

1993

6.2

1994

6.2

1994

6.0