2013

10.0

2014

7.9

2015

7.6

2013

7.8

2006

6.7

1989

6.6

1978

7.6

2021

7.2

2010

6.1

2009

7.3

2014

6.2

2019

7.0

2009

7.3

1990

7.7

1983

6.1

2010

8.4

2014

8.0

1976

7.4

1999

8.2

2017

7.5