1997

6.5

1985

0.0

1973

6.9

1985

6.7

1980

6.8

1984

6.5

2009

7.3

2020

7.5

2002

7.9

1995

6.1

1985

7.5

2003

0.0

1984

8.1

1969

7.0

1958

6.7

1974

7.5

1989

8.1

1960

5.0

1994

6.3

2013

6.9