2005

7.2

2009

5.6

2014

6.5

2017

5.9

2024

6.8

2020

5.6

2003

6.4

1997

4.7

7.8

2012

5.3

2016

8.0

2010

5.3

1937

7.1

1964

6.6

1965

5.5

2010

5.0

2006

6.5

1984

5.3