1960

6.9

2016

8.2

2014

6.5

2012

7.3

2013

8.0

2019

7.1

1970

7.3

2016

5.9

1996

7.9

2015

6.8

2007

7.1

1994

8.7

2012

7.7

2016

8.2

2009

7.4

2007

7.2

1982

7.5

1975

7.7

1980

8.2

2014

8.5