1991

8.7

1995

7.5

2012

6.3

1992

6.2

2018

5.7

2012

7.5

1994

3.8

2018

7.5

1998

7.1

1992

7.4

2009

6.3

2006

5.5

1997

8.3

2003

4.8

2018

6.3

2002

7.2

2004

6.1

2009

6.4

1993

8.4

2015

6.9

2024

7.0