1999

7.5

2012

6.8

2019

7.2

2017

7.7

2010

6.7

2013

7.3

2021

7.6

1987

8.4

2007

7.9

2015

7.5

2021

7.2

1990

7.1

1993

8.4

2019

7.6

2010

6.9

2005

7.0

2014

8.3

2016

7.3

2019

7.1

2019

6.4