2020

1.0

1990

6.1

2012

6.3

1976

4.5

1989

7.0

2006

5.9

1973

7.4

1971

7.0

2015

6.4

2020

6.0

2009

6.9

2011

6.9

1971

5.5

1990

5.5

5.0

2018

7.5

2014

6.2

2005

6.6

2016

7.1

2015

5.3