1973

7.4

2001

7.1

1978

7.5

2008

6.6

2013

5.6

1977

3.0

1984

6.0

1976

6.4

1994

7.0

1978

5.8

1987

5.6

1978

4.5

1986

6.1

1976

6.8

1994

5.0

1986

6.4

1978

6.5

1984

4.6

1977

6.8

1977

0.0