1969

7.0

2014

5.9

2015

6.4

1993

6.2

1975

4.5

1974

6.3

2007

5.4

2019

7.7

2021

6.6

2012

9.8

2013

4.0

2020

9.4

2009

5.4

2016

6.7

2022

6.6

5.0

1997

6.0

2017

5.9

2023

7.0

1998

6.2