2013

6.8

1993

6.1

2017

6.0

1998

6.2

1968

6.9

2018

7.3

2022

6.3

2016

6.7

2010

6.6

1931

5.8

2003

6.7

2021

10.0

2009

8.5

2009

6.3

2023

8.0

2003

8.7

1974

6.3

0.0

1976

5.5