2006

6.3

2014

6.4

2016

7.3

1999

6.1

1996

5.4

1956

6.9

2003

6.4

2006

5.4

2005

6.2

1993

7.0

1978

8.0

1969

6.7

2001

6.5

2002

5.9

1997

7.2

1995

7.3

2008

5.7

2006

6.0

2002

5.2

2016

6.5