1975

4.8

1897

5.0

2015

8.0

2015

7.4

2020

9.8

1974

5.4

1964

5.2

1984

7.0

2014

9.0

2009

5.0

2009

5.0

2006

3.8

2013

8.1

2012

10.0

2014

8.5

2004

7.5

6.1

1993

6.2

2001

7.0