1989

8.0

1996

6.1

1993

6.4

1990

6.9

1989

6.8

1993

7.7

1981

4.4

1985

6.5

1982

5.1

1990

1.0

1988

7.3

1999

7.3

1982

3.2

1984

7.3

2004

3.1

2000

8.0

1980

4.8

1979

5.0

2014

7.6

1999

6.1

1997

6.5

1982

5.2

2006

3.0

0.0