1974

6.5

2015

5.8

2008

6.2

2007

9.8

2010

6.0

1972

8.7

2005

5.4

2015

4.3

1928

6.0

2010

6.9

2012

8.2

1988

6.3

2011

9.7

2009

5.7

1963

7.1

2008

7.7

1965

6.7

2023

4.5

2017

6.9

2003

7.3