1988

5.0

2001

7.2

1993

6.4

1990

6.9

1988

5.8

1994

7.8

1982

7.3

1999

5.9

1991

7.4

1985

7.6

1997

3.0

1987

7.7

1996

7.8

1985

7.5

1992

6.2