1971

10.0

2019

6.4

2021

6.3

1972

7.1

2020

6.2

1999

5.1

2015

7.3

2012

4.7

2018

5.2

2018

5.5

2001

8.9

2009

6.8

1976

6.5

2021

5.3

1988

6.1

2008

7.3

2004

6.0

2005

5.9