1973

6.6

2013

6.8

2007

7.6

2020

6.7

1959

7.2

1997

6.6

1999

7.7

2006

6.0

2002

6.3

2000

7.4

2017

6.4

1996

6.9

2002

5.9

2004

7.5

2021

7.0

2024

6.7

2016

7.0

2019

4.0

2007

6.5

2014

5.1