2010

6.6

2012

7.1

1988

5.6

2004

6.1

1965

6.8

2006

5.5

2015

6.1

1992

6.7

1993

5.4

1965

7.4

8.1

1990

4.4

2003

6.0

1972

6.2

1988

5.9

2009

5.3

2005

5.7

2003

6.5

2011

6.2

2013

6.5