2001

7.2

2006

5.8

2006

7.5

2004

7.7

2006

7.5

1999

7.4

1974

8.6

1990

7.2

1996

6.8

2001

6.2

2003

7.2

1993

6.2

1995

8.0

1995

6.5

2006

6.9

1942

6.0

1994

8.3

1932

7.8

2004

7.4

1930

7.8