1985

6.8

1992

7.2

1985

8.3

1989

7.8

1996

4.5

1982

6.9

1990

6.2

1990

2.0

1984

7.4

1982

5.6

1976

7.2

1982

6.2

1990

10.0

1994

5.5

2020

8.5

1978

5.2

1993

8.3

1986

5.0