1982

6.7

1986

5.5

2009

6.2

1999

7.0

1975

5.2

1994

6.2

1993

6.9

1982

5.2

0.0

1980

6.8

1987

5.4

1991

9.0

2002

5.6

2014

5.5

1983

3.7

1990

5.9

1980

5.3

1971

7.7

1974

5.2

1979

5.8