1999

7.7

1977

7.5

2013

7.8

2019

8.1

2012

7.0

2015

7.6

2016

7.0

2020

7.2

2019

8.2

1972

8.7

2019

8.5

2013

6.3

2017

7.6

2003

7.8

2014

8.0

2015

7.5

1985

7.7

2014

7.9

1994

8.7

1998

7.2