2006

5.9

2016

5.2

1990

7.4

1992

6.8

1960

8.2

2013

6.0

1983

7.2

1987

6.9

2012

1.5

2005

5.9

2002

6.0

2005

6.3

2017

5.0

2005

5.6

2021

0.0

1973

6.8

2016

5.2

2016

5.9

2019

6.7

2000

6.8