1972

10.0

2015

6.1

2010

6.6

2017

5.6

1955

6.2

2003

6.0

2014

5.7

2010

7.4

2009

8.5

2007

7.1

2019

6.3

2009

6.3

1965

6.8

2015

7.1

2010

5.9

1975

8.4

1981

7.1

2020

7.0

2007

6.4

2006

6.8