1983

5.8

2003

7.6

1997

6.8

1994

7.4

2004

7.3

2001

6.0

2004

7.5

2008

7.3

1997

6.3

1993

8.0

1991

7.1

1992

7.1

2025

4.7

1998

7.0

1988

8.0

1999

7.5

2008

7.1

2016

5.3

2019

5.0

2007

7.3