1997

6.6

2004

4.9

1996

5.7

2004

7.9

1993

7.1

1998

6.8

2005

8.2

2010

4.4

1999

5.6

2020

6.7

1985

7.7

2014

4.6

2005

5.0

0.0

2010

8.0

1989

8.3

2000

7.1