1993

6.5

1980

5.9

2017

6.6

2007

7.7

2009

7.5

1996

9.4

2019

6.5

1964

10.0

1995

8.5

1986

4.0

2020

6.5

2015

6.5

2019

7.6

2010

6.1

2005

4.5

1971

3.2

2024

6.0