2014

6.5

1978

6.2

1969

5.1

2005

4.6

2007

5.8

2015

6.3

4.6

2016

6.1

2016

6.7

1944

7.1

1968

6.9

1995

7.8

2001

4.3

2010

6.1

1996

5.2

2004

6.4

2003

7.1

6.7

2003

6.8

1982

8.1