1994

8.0

1979

7.1

1990

7.4

1982

5.7

1994

7.2

2002

7.7

1993

7.1

1981

6.5

2008

6.8

1994

7.8

1988

6.9

1991

3.8

1995

7.3

2007

7.7

1992

5.9

1984

7.5

1996

6.9

2007

6.4

1989

8.3

1993

7.9

1979

7.0

1979

6.0

1997

7.7

1997

6.0