1997

6.7

1970

7.1

2020

0.0

1993

6.2

2007

6.6

2002

6.7

2018

8.2

2002

6.6

1977

6.2

2013

0.0

1989

7.5

1991

6.5

1936

5.9

1997

6.6

2001

6.2

2006

6.8

1960

4.2

1968

5.8

2006

6.6

2004

0.0