1997

6.3

2014

10.0

2003

9.8

2015

6.8

2005

7.1

1996

6.5

2016

6.7

1995

5.6

1987

5.2

2003

6.3

2020

6.7

2022

7.1

2014

7.0

1994

6.2

2019

7.0

2006

6.3

2020

6.5

1959

6.1

2017

6.6

2003

6.8