1998

7.1

1997

6.5

2006

5.0

1992

6.9

1983

7.1

1998

6.8

2015

6.8

2001

6.1

2006

5.1

2018

5.3

1991

6.6

2021

2.5

2010

7.4

2009

7.0

2016

6.3

2015

4.5

1995

6.4

2003

6.6

2022

6.0

2019

5.4