1981

5.3

1989

8.1

1986

0.0

2002

8.5

1995

4.2

1960

5.3

1972

5.4

1974

6.8

2005

6.3

2010

7.4

1997

6.0

1985

5.0

1997

7.5

1994

6.0

2005

6.4

1976

3.0

2006

6.7

1970

6.1

1971

5.8

1983

6.3

2000

7.6

1984

6.7

2016

7.5

1972

5.7

1968

9.5

1969

7.7

1976

4.0

1971

7.3

1965

0.0

2014

5.3

1979

5.5

1999

6.6

2006

7.3

1973

7.7

2004

6.2

2013

5.5