1995

5.9

2003

7.1

1998

4.4

1988

6.1

1990

6.5

1996

6.5

1997

5.1

1980

6.7

1991

0.0

2008

6.4

1982

6.3

1993

4.3

2005

3.7

1980

5.2

2020

0.0

2005

6.9

2009

6.0

1989

7.3

1992

5.7

2005

7.4