1977

6.0

1986

7.1

1995

6.9

1996

6.3

1963

7.9

1983

4.0

2005

0.0

1992

7.4

2001

6.0

1992

7.0

2007

4.0

1985

4.6

2001

7.6

2015

5.2

1978

6.5

1979

5.0

1984

6.8

1987

6.2

1975

6.5

2000

6.8

1982

0.0

1988

6.2