1970

6.0

2002

6.9

1950

6.8

1988

5.9

1998

0.0

1995

7.3

1984

0.0

2001

6.8

2006

5.1

2000

7.1

2001

6.9

1995

7.3

2002

4.9

1977

0.0

2009

6.7

2003

0.0

1931

6.0

2000

5.5

1934

6.7

2017

6.0