1993

7.1

2012

6.6

2022

6.4

2017

6.1

1991

6.3

2018

5.1

1976

4.8

2007

6.0

2014

8.5

2023

7.0

2018

6.2

1991

6.4

2013

6.1

2013

6.0

1996

9.4

2003

6.5

2002

6.4

2015

6.7

1994

7.7

1990

6.5