2006

7.4

2019

5.2

2010

5.8

2018

5.3

2002

7.3

1997

7.4

1984

7.7

1935

7.5

1998

6.7

2000

6.0

2005

6.0

1993

6.2

2009

6.1

2013

4.9

2018

4.1

2014

5.1

2017

6.8

1984

7.1

1990

6.5

1978

7.6