1979

6.0

2004

6.8

1985

5.8

1986

6.1

1970

4.2

1971

4.4

1968

4.9

1976

3.0

2006

4.7

1993

5.5

1964

7.1

1998

8.0

1976

0.0

1983

6.6

1988

5.4

1977

5.6

2014

5.1

1995

3.2

1974

1.5

1981

0.0