1997

6.8

1994

8.0

2008

6.8

1999

6.0

1991

6.7

1999

6.8

2002

6.1

2005

6.2

2000

7.1

2007

6.7

2007

6.6

2003

7.1

1997

7.6

2022

7.2

2006

4.4

2002

6.1

2017

5.8

2014

5.0

2001

5.7

2006

7.2