1979

5.8

1996

7.5

1996

6.4

1996

5.8

1979

7.0

1985

6.8

2013

7.9

1986

6.2

1989

6.7

1976

5.3

1993

7.0

1984

7.5

1979

7.3

2001

8.0

1987

8.4

1997

3.5

1980

5.9

1983

5.0

1981

5.3

1980

5.9

1998

5.0