1989

2.7

1980

6.0

1997

7.2

1977

5.5

1976

4.3

1975

5.5

1978

7.7

1974

7.9

1977

6.8

1973

5.2

1990

5.9

1978

4.1

1994

4.4

1983

6.0

1974

6.1

1979

5.1

1982

5.2

2011

8.3

1982

7.5

1970

7.5

1974

5.9

1989

3.6

2002

4.0

1971

5.0

1984

4.4

2003

4.8

1985

2.4

1974

7.0

1975

7.0

1972

6.4

2014

6.0

1983

7.5

1974

7.0

1974

2.0

1993

4.6

1974

5.2

1994

6.0