2013

3.5

2017

6.0

2017

6.8

2004

6.4

1984

6.5

1995

4.3

2000

5.5

1978

5.8

1998

10.0

2018

5.8

1979

4.8

1994

5.1

1968

6.6

2006

5.1

2007

6.2

2008

5.0

1998

6.1

2007

6.1

1932

6.9

2005

6.5