1975

6.0

2021

5.7

6.1

2014

5.6

2013

6.1

2021

1.0

2003

6.2

2021

9.2

1967

6.6

2020

9.8

2013

6.1

2020

2.8

2021

10.0

8.0

1969

5.5

2014

6.0

2014

4.9

2009

4.1

1997

6.3