1999

6.3

1987

6.9

1971

6.8

1993

5.5

2000

7.4

2011

9.5

2015

8.4

2012

9.7

2023

8.0

2007

10.0

5.2

2004

7.1

1993

10.0

2015

6.4

2016

5.8

2007

6.9

2017

6.2

2010

6.8

2010

7.0