1975

5.9

2025

8.0

1991

6.2

1990

6.7

1993

5.5

2007

6.2

2007

6.5

1994

5.8

1974

6.6

2007

10.0

1999

7.1

1956

7.7

2008

5.6

0.0

1967

6.9

0.0

1989

6.4

2003

7.2

2012

0.0

1954

6.6