1985

6.7

1980

6.8

1975

7.5

1984

6.5

2002

7.9

1995

5.4

1985

7.5

2013

6.8

1993

0.0

1973

7.0

1982

7.1

2012

4.0

1972

8.6

1994

7.1

1960

5.0

1994

6.3

1995

0.0

1989

8.1

1984

8.1

1969

7.0