2013

5.6

1972

6.9

2001

5.9

2003

5.7

1988

7.3

1976

4.0

1977

4.0

1972

6.7

1975

6.7

2005

5.0

1989

6.8

2006

5.2

1993

3.7

1966

5.6

1988

6.3

1987

6.6

1994

5.8

2005

6.2

2004

5.3

1996

5.7