2014

6.0

1989

7.8

1982

6.4

1984

4.8

2002

6.3

2003

6.8

2000

6.2

1976

1.0

2004

6.3

2014

7.1

2005

6.7

1956

3.0

2005

6.2

2003

6.5

2003

6.6

1990

6.7

2007

6.1

2006

6.3

1997

6.8

1999

6.6