1950

6.6

2015

8.1

2017

6.1

2018

6.0

2012

9.5

2009

5.6

2002

5.4

2013

6.9

2004

5.7

2004

6.4

1988

5.2

2012

7.3

2024

7.0

2007

6.3

1972

7.7

2001

6.4

2005

6.1

1996

8.2

1986

5.8

2005

9.8