1993

6.9

1991

5.2

1996

5.0

2017

4.8

2019

6.0

1979

6.8

1986

7.1

1990

1.0

1984

7.5

1994

0.0

1983

6.5

1997

6.0

2005

7.9

1979

7.0

1995

0.0

1990

0.0

1990

5.4

1994

6.0