2006

6.5

1995

6.4

2000

6.0

1960

6.1

1998

8.3

2017

5.2

2016

7.1

2019

6.2

2002

7.5

2012

6.2

1941

7.9

2007

0.0

2009

0.0

2012

0.0

1950

6.0

2005

8.0

2012

0.0

2016

7.0

2014

6.7

2016

7.0