1993

6.2

2014

5.9

2004

6.1

6.4

1975

4.5

2011

9.7

5.0

2012

9.4

1967

6.5

2002

5.5

2003

6.7

2024

8.4

2012

9.7

2021

6.2

2005

4.3

1976

5.9

2015

6.4

2004

10.0

2018

5.8