2016

7.3

1990

7.6

2019

8.4

2017

8.2

2018

7.8

2015

6.1

2010

7.7

1997

6.6

2011

8.5

2007

7.4

2012

7.5

2015

7.4

1998

7.6

1965

7.8

1993

7.0

2019

8.2

2012

7.6

1990

6.9

2020

7.4

2005

7.9