2003

9.9

1993

5.4

2007

10.0

2009

5.3

2013

6.2

2011

6.1

2014

6.3

2015

6.5

1987

7.4

1920

7.3

1949

6.2

2009

6.9

2014

7.1

2003

5.4

2017

6.6

2007

7.4

2004

6.9

1980

5.9

1976

4.5

2000

5.1