1995

7.6

2022

7.0

2007

6.6

2002

7.2

2020

5.3

2017

6.9

2007

6.0

1998

5.2

1999

5.4

2008

5.4

2007

7.2

1997

6.1

2012

6.7

1997

3.4

2017

7.2

2007

3.9

2014

4.4

1988

4.0

1973

6.1

2019

5.9