2004

5.5

1987

7.3

2001

7.3

1997

6.8

2005

6.6

2005

6.8

1996

6.6

2002

7.0

2001

6.7

1999

6.8

1998

6.6

1993

5.5

2014

5.1

1976

3.7

1995

6.6

2002

7.2

1976

6.1

1972

6.9

2005

5.5

2001

7.4