1988

5.0

2001

6.8

2011

6.3

1973

6.0

1975

7.4

2016

6.9

2007

0.0

1997

8.1

1998

3.5

1971

8.1

1996

6.4

1994

7.8

1996

6.8

1972

7.5

1995

7.3

1979

6.7

1986

6.2

1993

6.9

1992

6.7

1977

7.0

1984

5.8

1984

7.5

2009

7.5

2003

7.2

1983

6.3

1989

8.3

1989

5.0

1977

7.3

1975

7.2

1985

6.1

1978

7.2

2003

6.9

2002

3.6

1977

6.3

1995

6.5

1982

6.2

1994

7.2

2003

7.7

1999

5.8

1984

7.5

1987

4.7

1978

0.0