1997

6.2

1999

7.8

2003

6.7

2020

5.5

2020

4.8

2015

6.8

2023

5.7

2012

9.3

2019

6.1

2019

6.1

1962

7.2

1958

6.8

2024

10.0

2010

6.2

2013

5.4

2012

4.5

1951

6.5

2011

6.9

2003

5.4

2012

8.2