1991

7.9

2016

8.4

2002

7.5

2008

8.9

2016

8.6

2008

8.4

2005

8.1

2011

8.5

1999

7.4

2017

8.2

2022

8.3

2001

8.1

1999

8.6

2016

7.1

2005

8.6

2015

8.1

1959

8.5

2017

7.0

2016

7.1

2014

8.2