2001

5.3

2005

6.6

2002

5.8

1994

6.6

1997

7.5

2005

6.7

1922

5.0

2004

7.2

2013

0.0

2012

5.6

2007

6.6

1995

0.0

2015

0.0

2001

2.0

2013

0.0

2016

7.0

2000

7.3

2009

6.9

1984

6.9

2007

6.4