1996

7.5

1990

5.5

1997

6.5

2011

0.0

2007

6.8

2009

5.9

2008

6.5

2001

7.1

2004

5.0

2008

6.4

1995

6.3

2002

5.4

1986

1.0

2019

6.8

2016

6.1

1920

0.0

1994

3.2

1959

5.5

2009

5.9

1995

6.1