1984

7.8

1999

7.6

1981

6.6

1997

4.1

1987

5.5

1989

6.6

1963

7.9

1998

0.0

2002

5.3

1991

0.0

1990

7.6

1988

6.4

1993

6.1

1989

7.5

1983

7.0

1989

0.0

1983

6.7

1993

5.9

1990

7.2

2001

0.0