2001

6.6

2003

5.9

1996

5.6

1989

7.2

1994

6.6

2000

7.1

1996

7.0

2001

6.3

1930

0.0

1931

0.0

1976

0.0

1970

0.0

1999

6.2

1969

5.9

1967

6.7

2007

6.7

1998

6.5

1966

6.5

2004

5.3

2002

6.0