2006

5.3

2008

6.6

1998

6.4

1991

6.2

1998

6.1

1996

6.4

1968

7.1

2004

7.1

1973

6.9

1978

7.6

2006

6.7

1971

7.4

2007

6.2

2003

8.3

1980

8.2

2007

6.7

2002

5.3

1927

7.1

2003

7.2

1974

0.0