1997

6.4

1999

6.5

2019

7.7

2019

8.3

2024

6.0

2007

4.7

1980

6.2

2003

5.1

1968

7.0

2003

5.4

1978

5.9

2016

6.1

2021

8.5

2016

4.2

2005

5.5

2007

5.3

2013

4.4

2013

4.2

1995

7.6

2016

5.0