2015

7.3

2010

7.1

1999

8.0

2014

6.1

2020

7.0

1980

7.2

2013

6.2

2011

6.5

2011

7.1

2014

6.5

1953

7.3

2010

6.0

1987

7.3

1991

6.7

1979

7.6

2015

5.9

2016

7.9

2003

5.7

1951

7.6

1982

6.0