2010

6.3

2001

8.9

2015

7.3

2016

5.9

2000

8.5

2006

10.0

2003

7.3

2014

6.1

2012

7.7

1989

9.3

2014

8.4

2001

5.6

2017

5.5

1992

5.0

1987

4.1

1976

5.5

2019

6.3

2003

6.2

2007

6.7

2021

5.8