1990

8.5

1989

6.8

1998

4.8

2017

4.6

1995

6.3

1988

6.0

2019

7.5

2008

6.7

2004

7.7

2005

6.2

1997

5.3

2003

6.3

2007

6.2

2005

7.0

1994

6.7

1994

6.0

2000

5.4

1985

6.4

1982

5.5

1992

4.7