1968

6.9

1993

6.1

2015

8.4

2020

5.2

1991

7.0

1966

7.6

2014

6.5

2010

6.9

2001

6.9

1963

6.9

1995

9.6

2021

7.4

1982

5.9

2023

6.7

2005

5.2

2020

7.0

2023

6.6

2009

7.1