2001

6.2

1997

7.2

1988

6.8

2001

7.1

2000

7.0

1993

7.1

2005

5.9

1994

7.8

1981

5.5

1993

7.7

1991

7.4

2019

0.0

1996

4.0

2015

0.0

1998

10.0

2004

4.5

2013

3.1

1987

8.4

1998

7.9

1995

6.5

1990

7.9

2002

0.0

1998

6.8