1997

6.3

6.4

2023

6.7

2010

7.9

2024

5.9

1966

6.2

1985

6.8

2016

10.0

1972

6.6

2007

5.8

2011

6.7

2009

8.5

2010

6.5

1975

6.9

2015

3.1

1971

5.8

2017

3.5

2013

6.8

2005

7.2