2021

6.2

5.0

2007

5.8

2010

7.1

1975

4.5

1988

5.5

2014

7.3

2017

8.1

2015

6.4

2011

3.0

1967

7.7

2011

7.6

1973

7.2

1987

6.3

1984

5.4

2005

7.7

2010

6.9

2001

5.2

2008

6.2

2008

4.7