2015

7.6

2009

4.6

2010

6.1

2008

6.3

2003

6.9

2001

5.4

2014

4.5

2020

5.5

1998

6.6

2017

5.8

1974

6.4

1990

5.8

2015

5.9

2010

7.5

1932

6.2

1979

6.3

2013

5.9

2004

5.4

2024

5.7

2017

7.9