1989

9.3

2014

6.9

2007

10.0

1986

6.2

2015

6.6

2017

6.5

2020

6.5

2003

7.1

1996

5.8

2012

6.4

1988

6.2

2016

6.7

1988

5.7

2003

7.0

2013

6.5

1933

6.2

1965

6.4

2009

5.5

2019

5.7

2021

9.2