1970

5.8

1975

4.2

1996

5.9

1994

6.0

1981

6.4

1990

6.8

1977

5.9

1985

6.2

0.0

2015

3.5

1985

4.0

2024

10.0

1967

6.6

1998

1.0

2016

1.0

1994

5.9

1993

7.1

1964

7.4

2006

6.5

1989

6.8