1994

6.2

1984

7.7

2008

4.8

2002

5.1

2006

4.1

1998

6.4

1988

4.9

2003

3.9

1991

8.1

2003

6.2

2006

6.0

2000

7.4

1989

7.0

1992

6.7

1998

6.6

1992

5.3

1985

5.9

2004

5.2

2020

5.7

1982

6.0